After a weekend sweep of the Reds that included a series of notable rallies and some long-awaited power displays from a lineup that desperately needed it, the Nationals returned tonight to face the Padres hoping for at least some carryover effect.

Instead, they got the exact opposite. During the course of a lackluster 4-0 loss, they did very little at the plate, squandering the scoring opportunities they had and rarely hitting the ball with any real authority.

Thus did the Nats lose for the first time since the All-Star break, missing a chance to sustain some positive momentum with a tepid showing at the plate against an unheralded opposing pitcher.

Randy Vasquez, a 25-year-old right-hander who has given up a bunch of hits – especially homers – this season, combined with three San Diego relievers to shut out the Nationals on only 102 pitches.

"We hit some balls hard, but we just couldn't get any good swings off," manager Davey Martinez said. "We swung the bats today, but we really didn't work good at-bats."

The Nationals used the days before and after the All-Star break to carry an extra reliever. Turns out they only used him once before sending him back to the minors.

Eduardo Salazar, who impressed in his July 14 outing against the Brewers, was optioned to Triple-A Rochester this afternoon, a move necessitated by the return of DJ Herz, who starts tonight’s series opener against the Padres.

Salazar, who posted eye-popping numbers in nine games with Rochester after the Nationals claimed him off waivers from the Mariners last month, was called up for the final two days before the All-Star break when the club could afford to carry a ninth reliever. He pitched two innings in the first half finale in Milwaukee, striking out four batters with a sharp-breaking slider, though he also issued two walks in that game.

The Nats kept the nine-man bullpen for last weekend’s series but never summoned Salazar while sweeping the Reds. So the 26-year-old now heads back to Triple-A, where he’ll hope to make an impression again and earn his way back to the majors.

“I think we will see more eventually,” manager Davey Martinez said. “The thing about it that’s tough is, one, he’s got options. Two, he’s a depth piece for us. But he threw the ball really well. So I’m sure we’ll see more of Salazar.”

The Nationals couldn’t have asked for a better start to their second half, sweeping the Reds over the weekend in impressive fashion. Now they’ll have to try to keep it going against a team that recently swept them.

The Padres are in town, and it was only four weeks ago when they won three straight against the Nationals during a wild series in San Diego that ruined a lot of positive momentum they had built up earlier in June.

One of those games at Petco Park was started by DJ Herz, who makes his return to the big leagues tonight after officially getting recalled from Triple-A. (Reliever Eduardo Salazar was optioned to Rochester to clear up that roster spot.) Herz essentially got a 16-day break since he last pitched up here, making only one abbreviated start for Rochester to keep his arm fresh. It will be fascinating to see how the rookie left-hander returns, and whether he can find some level of more consistency than he showed in his first stint.

Right-hander Randy Vasquez is tonight’s opponent, and he will be a new face from the Nationals’ perspective, nobody on the current roster having faced him before. There will be a few ex-Padres in the lineup, though, with some extra motivation against the franchise that traded them. How will James Wood and CJ Abrams handle this assignment?

WASHINGTON NATIONALS vs. SAN DIEGO PADRES
Where: Nationals Park
Gametime: 6:45 p.m. EDT
TV: MASN2, MLB.tv
Radio: 106.7 FM, 88.7 FM (Spanish), MLB.com
Weather: Chance of rain late, 88 degrees, wind 7 mph out to left field

The second half schedule afforded the Nationals the option of waiting a while before using their fifth starter. They’ve decided, though, to go ahead and use him now.

The Nats will send that yet-to-be-announced starter to the mound Tuesday against the Padres in what is actually the team’s fourth game coming out of the All-Star break. That pushes left-hander Mitchell Parker back to Wednesday’s game, with Patrick Corbin (who started Friday night’s second half opener) pitching Thursday’s series finale against San Diego.

The presence of an off-day on the schedule this week gave the Nationals some room to maneuver if they wished. They don’t actually need a fifth starter until Saturday’s game in St. Louis, the eighth game coming out of the break.

But rather than offer all of the extra rest to one pitcher, the club decided to give others (especially Parker) an extra day before taking the mound.

“Exactly, that’s what it boils down to,” manager Davey Martinez said. “We want to try to give these guys as much rest as we possibly can. Some of these guys are going to pitch a lot more than they have in the past, so we’re trying to just stretch this out a little bit.”

Desperate for a fresh bullpen arm, especially one who could pitch multiple innings if needed, the Nationals recalled right-hander Joan Adon from Triple-A Rochester before today’s game, a move that also resulted in the demotion of left-hander DJ Herz.

Playing their 11th game in a stretch of 17 consecutive scheduled game days, the Nats knew their pitching staff was running on fumes. The last week saw the team play three extra-inning games, then the last three days saw their starters combine for only 12 2/3 innings.

So they made the call to bring up Adon, a starter throughout his career in the majors and minors but recently converted to a reliever in Rochester. The 25-year-old will be available for long relief, a role he could hold for the long term given the club’s lack of anyone else who fits that description so far this season.

“The bullpen’s been worked a lot, as we know,” manager Davey Martinez said. “It just gives us one more arm in the bullpen for the next five days, until we figure out what we’re going to do next. Hopefully, he can help us out there.”

Adon has started 26 games for the Nationals since 2021, with few positive results. In those games, he’s 3-16 with a 6.56 ERA and 1.732 WHIP. His numbers, though, were much better early in those starts than later. Opponents batted just .231 against him on his first through 50th pitches, then hit .307 against him after that.

A stretch of 17 games in 17 days in blistering early July heat has long loomed on the Nationals’ schedule. This was going to be a test not only of this growing team’s ability to compete with opponents in the pennant race, but also of this team’s physical and mental fortitude.

All of that is being put to the test right now, and though the Nats have managed to pull off some inspired wins along the way, the grind clearly is getting to them. Especially their pitching staff.

Today’s 8-3 loss to the Cardinals saw DJ Herz labor for 4 1/3 innings, putting added strain on a bullpen that already was running on fumes. What had been a decided strength through most of the season’s first half has devolved into a liability this week, with five top relievers pressed into overtime duties and the other three forced to pitch out of necessity.

Among the biggest takeaways from the last two days, in particular: The Nationals sorely lack a long man in the pen. And they may not be able to proceed much longer without one unless their starters can consistently churn out six innings a piece.

"Most of our bullpen has been going one-plus innings right now," manager Davey Martinez said. "We're trying to get to that All-Star break, to give them a break. We need some length tomorrow from our starter, that's what we need."

Saturday was a good day for the Nationals, who fielded their youngest lineup in years and scored 14 runs thanks to homers by James Wood, CJ Abrams and Keibert Ruiz. Now, can they keep something like that up? Too often this season we’ve seen an offensive explosion followed up by a lifeless showing at the plate. The challenge today: Don’t let up.

As has been the case in each of the first two games of this series, the Nats will face a veteran right-hander. They did well against Sonny Gray. They did great against Lance Lynn. Today, it’s Kyle Gibson, who enters with a 3.88 ERA but has allowed four runs in five or fewer innings in each of his last two starts.

DJ Herz starts for the Nationals, and if you think you know what you’re going to get from the left-hander, you’re fooling yourself. He’s been impossible to predict so far, with two absolutely dominant starts (including his last one against the Mets) and four shaky starts in which he didn’t complete five innings. It would be great to get back-to-back solid outings from the rookie, but the Nats have to be realistic about the situation.

It's a big day here for other reasons: The All-Star rosters will be announced later this evening, so it could wind up being a really memorable day for Abrams, Kyle Finnegan or Jake Irvin. Or perhaps even more than one of them …

WASHINGTON NATIONALS vs. ST. LOUIS CARDINALS
Where: Nationals Park
Gametime: 1:35 p.m. EDT
TV: MASN, MLB.tv
Radio: 106.7 FM, 88.7 FM (Spanish), MLB.com
Weather: Partly cloudy, 93 degrees, wind 6 mph in from left field

Tuesday’s news on Josiah Gray and Cade Cavalli wasn’t good, certainly not in Gray’s case. The Nationals’ Opening Day starter, who landed on the injured list after two outings with a right flexor strain, has been shut down during the final stages of his rehab assignment after a recurrence of elbow discomfort and is scheduled to visit specialist Keith Meister in Dallas during the All-Star break.

We won’t know until then whether Gray’s injury has become far more significant and requires surgery, or whether he managed to avoid the worst and just needs more time off. Either way, it’s clear he won’t be pitching in the big leagues anytime soon, and his 2024 season could end up a complete wash.

There’s still reasonable hope for Cavalli pitching major league games for the Nationals in the relatively near future, though his return from Tommy John surgery isn’t as imminent as it once looked after the right-hander came down with the flu last week and now needs to start building up his arm yet again. Both Cavalli and Gray’s rehab assignments have been shut down.

This would have qualified as terrible news back in April. The Nats absolutely were counting on both Gray and Cavalli to be a big part of their 2024 rotation, and then for years to come after that.

It’s still bad news, but it may not be as damaging to the club’s short-term and long-term hopes as most would’ve thought when the season began. For that, we can thank the remarkable and unexpected ascension of three other young starting pitchers who have dazzled so far in the majors this year: Jake Irvin, Mitchell Parker and DJ Herz.

James Wood has spent all of two nights in the big leagues. Each time, the Nationals’ top prospect has found himself stepping to the plate to lead off the bottom of the ninth inning in a tie game. Each time, he hasn’t been able to score the winning run.

And each time, the Nats went on to lose to the Mets after a disastrous top of the 10th.

The script was basically the same tonight, New York scoring five 10th-inning runs after exploding for six in Monday’s series opener. The Nationals didn’t have a last-ditch rally in them and thus lost their fifth straight to their division rivals, this time by a more lopsided score of 7-2.

"I think I've kind of been learning quick that how close these games really are," Wood said, "and one play can really make a difference."

Kept off the bases his first three times up tonight, even though he scorched the ball each time, Wood finally got a chance to face a right-hander in his fourth plate appearance of the game, his ninth overall in the big leagues. He saw six pitches from the Mets’ Jose Butto, didn’t swing at any of them, and wound up drawing the walk.

Monday wasn’t a typical day at the ballpark. Today should be, as the hullaballoo of James Wood’s debut dies down and the rookie outfielder just gets to work on being a big leaguer for a team trying to start winning games again.

The Nationals had themselves within a game of .500 just over a week ago, but they’ve lost six of their last seven and now suddenly sit at 39-45, three games behind a Mets team they led for most of the season’s first half. They need to get this thing back in gear before it spirals too far out of control.

Wood and his teammates will be facing another left-hander tonight in Sean Manaea. The 32-year-old has solid numbers (3.89 ERA, 1.297 WHIP, 76 strikeouts in 76 1/3 innings) but he’s also walking four batters per nine innings. A Nats lineup that frequently hasn’t shown enough patience needs to show it tonight.

DJ Herz, meanwhile, starts for the Nationals, and the rookie left-hander needs a bounceback performance after back-to-back shaky outings on the road that have made his 13-strikeout gem against the Marlins feel like a distant memory. We still don’t know what exactly is going on with Josiah Gray and Cade Cavalli, so Herz’s job may not be on the line tonight. But a strong outing would certainly help his cause to stick around and avoid a trip back to Triple-A Rochester.

WASHINGTON NATIONALS vs. NEW YORK METS
Where: Nationals Park
Gametime: 6:45 p.m. EDT
TV: MASN, MLB.tv
Radio: 106.7 FM, 88.7 FM (Spanish), MLB.com
Weather: Mostly clear, 84 degrees, wind 10 mph out to left field

SAN DIEGO – This series between the Nationals and Padres didn’t need any more drama. Not after the extra-inning theatrics on Monday and the extracurriculars on Tuesday.

It felt like both teams got everything off their respective chests last night and could just play a regular ballgame Wednesday.

They were able to do so. Except the Nationals were searching for a victory to avoid getting swept out of San Diego and couldn’t overcome an early deficit in an 8-5 loss in front of an announced crowd of 37,397 at Petco Park.

DJ Herz was tasked with holding the Padres lineup in check after it scored a combined 16 runs over the first two games. But as in his previous start in Colorado, the rookie southpaw couldn’t get out of the fourth inning. Today marked the shortest outing of his five major league starts to date.

Kyle Higashioka snuck a two-run homer down the left field line to give the Padres a 2-0 lead in the second. Herz left an 81 mph changeup right down the middle of the plate for the catcher to smack.

SAN DIEGO – Are there any more fireworks left in this series between the Nationals and Padres? The Nats certainly hope so as they look to avoid the three-game sweep in today’s finale.

Last night’s game was full of emotion and got pretty heated early, but it eventually settled down and became more about baseball than any off-field theatrics. Let’s see if the Nats can take the frustration of these two losses and turn it into something positive before heading to Tampa Bay.

While the Nats have been able to score runs over the first two games of this series, they haven’t been able to keep the Padres from doing so as well. They’ll turn to rookie DJ Herz to hold this lineup and give them a chance to get out of here with a win. Herz was charged with four runs (three earned) in his last start at Coors Field, so he’ll try to get back to what made him so successful when he struck out 13 Marlins over six shutout innings in his start before that.

Meanwhile, Dylan Cease hasn’t been all that impressive after coming to the Padres from the White Sox this spring in exchange for four players. The veteran right-hander is 6-6 with a 4.14 ERA and 1.106 WHIP in 16 starts.

WASHINGTON NATIONALS at SAN DIEGO PADRES
Where: Petco Park
Gametime: 4:10 p.m. EDT
TV: MASN2, MLB.tv
Radio: 106.7 The Fan, DC 87.7 (Spanish), MLB.com
Weather: Sunny, 75 degrees, wind 10 mph from left to right

DENVER – DJ Herz’s start Friday night bore no resemblance to his previous outing, when he took Nationals Park by storm and struck out 13 Marlins batters over six innings of one-hit, shutout ball.

In this game at Coors Field, the rookie left-hander lasted only 3 2/3 innings, giving up four runs (three earned) on seven hits, all while throwing 76 pitches before getting the hook from manager Davey Martinez.

There was one similarity, though, and it was an important one that could bode well for future starts. As he did against Miami, Herz did not issue a walk against Colorado. He forced the Rockies to beat him, not giving them any help along the way.

“I thought it was good for the most part,” he said after the Nats’ 11-5 victory. “I’m happy about the amount of strikes, and the no walks again. Every time they scored, we answered, so it was good to see the run support and everybody hitting the ball tonight. It was really fun.”

Herz was hit hard, serving up three homers during a seven-batter span between the third and fourth innings. But two of those were solo shots, and the other was a two-run homer only because of third baseman Nick Senzel’s throwing error moments earlier. Herz didn’t create jams by losing control.

DENVER – Nobody in the clubhouse wanted to admit it this afternoon, but surely everyone was thinking it. If ever there was a place built to snap a moribund lineup out of its funk, it had to be Coors Field, right?

The Nationals arrived in the Mile High City reeling from a three-game series against the Diamondbacks in which they scored a total of five runs and saw a grand total of 287 pitches. (Somehow, they still won one of those three games.) But spirits remained high, because a weekend set with the Rockies felt like just what the doctor ordered.

And indeed it was, because in the series opener in the best hitter’s park in America, the Nats put forth one of their best offensive performances of the year, cruising to an 11-5 victory behind a season-high 19 hits.

"They responded really well," manager Davey Martinez said. "We talked a lot about know yourself. Know who you are. Know what pitches you want to attack. Stay on the fastball. We did well today."

Everybody in the lineup reached base once, and all but Nick Senzel reached multiple times. But Lane Thomas led the way with an RBI single, a two-run double and an RBI triple, the red-hot right fielder coming up just short of his first career cycle when he grounded out and then struck out in his final two at-bats.

DENVER – The Nationals couldn’t hit a lick in three games at home against the Diamondbacks. Maybe a three-game series at Coors Field against the Rockies will do the trick.

If ever there was a ballpark – and an opposing pitching staff – that could snap a team out of its offensive funk, this is that combination. There’s no better place to hit in baseball, and the Rockies give up a major-league-worst 5.87 runs per game (leaps and bounds more than the next-worst pitching staff: the White Sox, at 5.17).

As of this writing, we’re still waiting to see tonight’s lineup, so we don’t know if CJ Abrams is ready to return or if he still needs another day off due to the cyst on his left wrist. Obviously, the Nats would love to have their leadoff man and shortstop playing for them. Whether Abrams plays or not, they’ll still need much more production from others in the lineup, including Lane Thomas, Jesse Winker and Keibert Ruiz.

DJ Herz takes the mound for the Nationals, and it will be fascinating to see how he does tonight on the heels of his brilliant, 13-strikeout gem against the Marlins. It really does seem to boil down to Herz’s ability to keep the ball in the strike zone. And that’s all the more important here, where you simply can’t afford to give away free passes and allow small rallies to turn into big rallies.

WASHINGTON NATIONALS at COLORADO ROCKIES
Where: Coors Field
Gametime: 8:40 p.m. EDT
TV: MASN2, MLB.tv
Radio: 106.7 FM, 88.7 FM (Spanish), MLB.com
Weather: Slight chance of rain, 80 degrees, wind 7 mph in from left field

The streak began, interestingly enough, with Mitchell Parker on the mound. It was June 6, the opener of a four-game series against the Braves, the Nationals reeling from a three-game sweep at the hands of the Mets.

Each of those losses to New York included a ragged performance by the Nats’ starter. So it was up to Parker, a rookie making his 10th career big league start, to reverse that trend. And though his team wound up losing that night, it wasn’t Parker’s fault. He allowed only two runs over seven innings, only four Atlanta batters reaching base against him.

Fast-forward 10 days, and Parker was back on the mound facing the Marlins, this time seeking a three-game sweep for the Nationals. And with six innings of one-run ball, he led his team to victory and continued a remarkable stretch of pitching by the entire rotation.

Over those 10 games, Nats starters have given up a total of nine earned runs. Not once have they been charged with more than two in any individual game. They’ve struck out a combined 55 batters while walking only 13.

“Everyone’s throwing well,” Parker said after Sunday’s win, the team’s eighth in nine games. “It’s contagious.”

The first time he struck out Tim Anderson, it was merely a nice way to start the afternoon. The second time he did it, it was the continuation of an already impressive outing. The third time he did it, DJ Herz hopped off the mound, slapped his hand to his glove and floated all the way back to the Nationals dugout, where teammates and coaches alike couldn’t wait to greet the rookie left-hander with high-fives and hugs.

The third start of Herz’s major league career had just come to an end, and it included a standing ovation from the crowd of 25,637 at Nationals Park who just watched this previously unknown 23-year-old put together one of the most dominant and most efficient starts in club history.

With six innings of one-hit, zero-walk, 13-strikeout ball on 84 pitches in a 4-0 victory over the Marlins, Herz etched his name alongside some of the best pitching performances the Nats have ever witnessed.

"I think this outing, I wanted to control my body language a little more, be a little better with that," Herz said. "And the first five innings, it was perfect. And then I got the last strikeout, and I kind of had a little feeling that I was done and just let my emotions fly a little bit. It was awesome."

He’s only the fourth person to wear the curly W cap and strikeout out 13 or more batters without issuing a walk. Max Scherzer did it four times during his Hall-of-Fame career. Stephen Strasburg did it twice, including in his historic major league debut. And John Patterson did it during the inaugural 2005 season at RFK Stadium.

The Nationals and Marlins have played five times so far this season. The Nationals have won all five games. The combined score of those games: 41-17. It’s been a while since we’ve seen the Nats dominate an opponent to this extent. They’ll gladly take it.

The Nationals have pitched well against most clubs this year. They haven’t hit well against everyone, so that makes their offensive output against Miami particularly pleasing. And they’ll look to keep it going today against left-hander Trevor Rogers, who they beat in late April with three runs in five innings. Davey Martinez’s lineup looks a little different against the lefty. Ildemaro Vargas, Drew Millas and Trey Lipscomb are all in there, with Lipscomb starting at third base and Nick Senzel serving as DH for this one.

DJ Herz makes his third career start, his first against the Marlins, and the left-hander will be looking to complete five innings for the first time. With Josiah Gray (who tossed four strong innings in a rehab assignment at Double-A Harrisburg Friday night) inching closer to a return, each of Herz’s starts now become increasingly important as he tries to state his case to stay up here.

WASHINGTON NATIONALS vs MIAMI MARLINS
Where: Nationals Park
Gametime: 4:05 p.m. EDT
TV: MASN2, MLB.tv
Radio: 106.7 FM, 88.7 FM (Spanish), MLB.com
Weather: Mostly sunny, 84 degrees, wind 10 mph in from left field

NATIONALS
SS CJ Abrams
RF Lane Thomas
LF Jesse Winker
1B Joey Meneses
2B Ildemaro Vargas
DH Nick Senzel
C Drew Millas
3B Trey Lipscomb
CF Jacob Young

The Nationals are currently doing something they haven’t done in their nearly 20 years since relocating to D.C.: Running out a rotation with four left-handers.

Injuries to right-handers Josiah Gray and Trevor Williams have called for replacements, who just happened to be left-handers to make for a mostly lefty rotation that is rarely seen in baseball.

They are in the middle of a stretch where they have all four starting in succession. Three are scheduled to start against the Marlins this weekend started by MacKenzie Gore on Friday, and continuing with DJ Herz today and Mitchell Parker on Sunday.

It’s an ironic roster quick for manager Davey Martinez, who isn’t used to having too many lefties on his roster, starter or reliever.

“I couldn't even explain that really,” he said. “I sit back and go, 'How in the world did that happen?' But I like the ones we got, that's for sure. They're doing really well. Even DJ. I talked to him a little bit about the shape of his breaking ball. Right now, his changeup is good, his fastball is good. We worked out a little bit on the shape of his breaking ball. So when that starts coming around, he could really, really, really do well. So the other guys, they got no fear, right? I love them. They attack the zone. They're not afraid to throw their pitches when they need to, sliders or splits. They've been really good.”

There was a moment in the top of the second inning Sunday when it felt like DJ Herz was about to crumble.

The rookie left-hander, in only his second career start, had cruised through the top of the first but then during a four-batter span the following inning had given up two runs after issuing two walks, allowing two singles and uncorking two wild pitches, the last of which came after back-to-back, high-and-tight fastballs to Jarred Kelenic that left the Braves left fielder contemplating whether he needed to charge the mound.

And then Herz, who had been known in the minors to let a game get away from him from time to time, battled back and struck out Kelenic on his next pitch before getting Ozzie Albies to fly out on the pitch after that. The inning was over, and Herz had thrown 33 pitches, but only the two runs had crossed the plate.

“I’m proud of him,” Nationals manager Davey Martinez said. “Because a situation like that, and a good team like that, he was able to get composed and throw strikes when he needed to, get out of a big jam there and keep us in the ballgame.”

Herz wasn’t credited with his first big league win at the end of the day. Because he didn’t complete the requisite five innings, he couldn’t get the W, which instead went to reliever Jacob Barnes at the official scorer’s discretion. But he impressed nonetheless during his 4 1/3 innings, the majority of which featured plenty of outs and few baserunners.