PHOENIX – Hello from the Valley of the Sun, where the temperature is only topping out in the 80s this weekend. Which means the roof at Chase Field will be open both tonight and Saturday. Around here, that’s a huge win.

Speaking of huge wins, the Nationals are coming off a big one over the Cubs to cap a solid homestand. They’ll try to keep their winning ways alive on the road, where they’ve been a much better team so far this season.

The good news: They’ve got Josiah Gray on the mound for tonight’s series opener against the Diamondbacks. The bad news: They almost certainly don’t have either Hunter Harvey or Kyle Finnegan in their bullpen after those guys each pitched the last three days. Quality innings from Gray will be key tonight, and then someone else from Davey Martinez’s bullpen will have to close it out.

A lineup that started to show signs of power back home will hope for more of that in the warm, dry air here. This has always been a good hitter’s park, and it’s even more so when the roof is open. The Nats will try to hit some balls in the air tonight against Arizona right-hander Merrill Kelly.

WASHINGTON NATIONALS at ARIZONA DIAMONDBACKS
Where: Chase Field
Gametime: 9:40 p.m. EDT
TV: MASN2, MLB.tv
Radio: 106.7 FM, MLB.com
Weather: Clear, 79 degrees, wind 12 mph left field to right field

Just over 30 games into the season, who would you guess would be the Nationals’ RBI and slugging percentage leader?

Probably one of their power hitters like Joey Meneses or Dominic Smith. Or maybe even one of their better contact hitters like Jeimer Candelario or Keibert Ruiz.

Any one of them would be a good guess, especially considering how high up the batting order they primarily hit.

But they would be wrong, as the correct answer is CJ Abrams, who is slugging .386 with 15 RBIs over his first 30 games.

“I did know that,” Abrams said with a grin when asked if he knew he was the team’s leader in runs batted in.

The Nationals are enjoying the last three games at home after entering this homestand with a sub-.500 record on South Capitol Street and having dropped two of three to the Pirates over the weekend and the series opener to the Cubs on Monday.

But it all came together these last three days in the forms of a 4-1 win Tuesday, a 2-1 win yesterday and a 4-3 win this afternoon, this one delivered by Alex Call’s walk-off home run down the left-field line to send the announced crowd of 18,577 home happy.

The win was the Nationals’ third in a row and sealed their third series win in their last four matchups. It was also completed in 1 hour and 55 minutes, the third-fastest game in the majors this season.

Coming up for his fourth at-bat, Call had already had an eventful day. Starting in center field for Victor Robles, he made a spectacular diving catch to rob Dansby Swanson of a hit in the seventh and preserve a strong outing by Patrick Corbin. But at the plate, he was less fortunate with an 0-for-3 start and two hard lineouts to third baseman Patrick Wisdom.

That’s why you always look to the next one.

The Nationals will look to win this four-game series against the Cubs this afternoon on South Capitol Street after taking the last two games. A win will also give them a winning homestand. They’ll hop on a flight tonight and embark on a six-game West Coast road trip to Phoenix and San Francisco after finishing with Chicago.

Patrick Corbin will take the mound for his seventh start of the season, fifth at home, bringing his 1-4 record, 5.74 ERA and 1.660 WHIP. The numbers still don’t impress, but Corbin has been better so far this year in keeping the Nationals close. He has departed the game with his team ahead, tied or within two runs in five of his six starts, and he has turned in quality starts in two of his last three outings with a much better 4.15 ERA over those games.

The Cubs will activate Jameson Taillon from the injured list to start for the visitors. The veteran right-hander went down with a groin strain after only three starts, going 0-2 with a 4.50 ERA and 1.357 WHIP. He’s 0-1 with a 3.86 ERA over five career starts against the Nats and 0-1 with a 3.32 ERA over three starts at Nationals Park.

Today will be the Nats’ last chance on this homestand to improve their record at Nationals Park. Overall, they’re 5-12 at home while actually playing above-.500 ball on the road with a 7-6 record. They’re 3-3 so far on this homestand.

CHICAGO CUBS at WASHINGTON NATIONALS
Where: Nationals Park
Gametime: 1:05 p.m. EDT
TV: MASN, MLB.tv
Radio: 106.7 The Fan, MLB.com
Weather: Mostly cloudy, 58 degrees, wind 9 mph in from left to right field

Jake Irvin had a solid major league debut Wednesday for the Nationals.

It wasn’t anything too spectacular, nor was it expected to be. A promising pitcher in his own right, he didn’t come with the pedigree of his former University of Oklahoma teammate Cade Cavalli. And his debut definitely didn’t come with the pomp and circumstance that surrounded the debut of Stephen Strasburg, who remains the last starting pitcher to make his major league debut with the Nationals and earn the win back in June 2010.

But Irvin’s start against the Cubs was still encouraging enough that the Nationals are going to keep him around for a little while longer, though not fully committing to him making another start in the big leagues.

“Yeah, we're gonna keep him around,” manager Davey Martinez said of Irvin during his pregame media session ahead of Thursday’s afternoon finale against Chicago. “We haven't decided yet what we're gonna do for that starter's spot. But if he's here till then, he'll get a chance to start again.”

The 26-year-old right-hander pitched 4 ⅓ innings last night and gave up just one run on two hits and four walks while striking out three, all looking. He threw 81 pitches, 45 strikes, after throwing 82 pitches, 52 strikes, in his previous start for Triple-A Rochester last week. That was his best start with the Red Wings before getting the call to Washington, striking out six and allowing two runs over 5 ⅓ innings.

With two on and nobody out in the top of the ninth Wednesday night, Kyle Finnegan’s thoughts hearkened back 12 days prior, when he faced an identical situation and lived to tell about that.

That cold night in Minnesota, Finnegan pitched his way out of a jam by getting a lineout and then a 5-4-3 double play, preserving a one-run victory for the Nationals. This time, he pulled it off thanks to a fielder’s choice on a bunt, then a 6-4-3 double play, preserving another one-run victory.

“I found myself there a couple times before this year,” Finnegan said. “Knowing that I’ve gotten out of it before helps a lot. And we’ve been turning so many double plays behind us, you know you’re never really out of it.”

Look at Finnegan’s 2023 totals to date, and it’s easy to believe he’s having a disastrous season. His ERA is 6.00. His WHIP is 1.583. He has surrendered three homers in only 12 innings.

That doesn’t accurately reflect his true performance to date, though. Most of those lofty numbers were the direct result of one awful appearance on April 4 against the Rays, when he was roughed up for five runs while recording only one out, surrendering all three of those homers.

Jake Irvin did his part in his major league debut to give the Nationals a chance to win. His teammates then did just enough to actually emerge with the win.

CJ Abrams drove in the go-ahead run in the bottom of the seventh for the second straight night, and the Nats bullpen tossed 4 2/3 innings of scoreless ball following Irvin’s solid-if-abbreviated first career start to beat the Cubs, 2-1, and ensure at least a split of this four-game series.

Called up from Triple-A Rochester to make his debut five years after the organization selected him from the University of Oklahoma in the fourth round of the draft, Irvin survived some occasionally erratic command to hold Chicago’s lineup to one run before departing with one out in the fifth.

The 26-year-old right-hander was rated the Nationals’ 20th-best prospect by MLB Pipeline. He wound up outperforming several far more highly touted pitchers who have come and gone over the years, and gave club officials enough reason to want to see more of him.

"This is something you dream of since the day you pick up a baseball," he said. "I'm on top of the world. And props to the team, man. The guys played great behind me."

The Nationals have their utility man back in the dugout tonight, with Ildemaro Vargas activated from the 10-day injured list about 3 1/2 weeks after he jammed his left shoulder making a diving play in the field.

Vargas rejoins the team after a brief rehab stint with Triple-A Rochester, where he appeared in three games and went 1-for-10 at the plate.

“I watched some of his swings last night,” manager Davey Martinez said. “I know he struck out, but he hit some balls hard. He felt good. He said he had no pain whatsoever.”

The 31-year-old infielder hurt himself April 9 in Colorado when he jammed his shoulder while making a play at second base against the Rockies. He finished the game but was in significant pain the following day, so the Nationals placed him on the IL and called up Jeter Downs to fill his role on the bench.

Downs, 24, wound up appearing in only one game during his three weeks on the big league roster, and that came late in Saturday night’s blowout loss to the Pirates. A onetime top prospect of the Dodgers and Red Sox, he was claimed off waivers this winter by the Nationals, who intended to have him play every day at Triple-A and see if he could recapture the form that made him so coveted he was a key piece in the trade that sent Mookie Betts from Boston to Los Angeles.

There’s nothing quite like a major league debut, especially when the guy debuting is a starting pitcher. No, Jake Irvin isn’t a top prospect in the Nationals organization, and his start tonight isn’t as significant as Cade Cavalli’s debut last summer. But it’s still a big deal for any pitcher who was drafted, developed and moved up the organizational ladder to see his dream come true and start a big league game.

Irvin is no kid; he’s 26 years old, drafted in the fourth round in 2018 out of the University of Oklahoma (where he was teammates with Cavalli, by the way). He missed the 2021 season while recovering from Tommy John surgery but was healthy throughout the 2022 campaign, reaching Double-A Harrisburg. The Nats added him to the 40-man roster this winter, and now they’ve called him up after five starts at Triple-A Rochester.

Irvin isn’t the only addition to the Nationals’ roster for tonight’s game. Infielder Ildemaro Vargas has been activated off the 10-day injured list, his left shoulder now healed. To make room for both players, Jeter Downs and Cory Abbott were optioned back to Rochester.

The Nats will be looking to make it two in a row against the Cubs, who have veteran Marcus Stroman on the mound. The 32-year-old right-hander has been excellent so far, with a 2.29 ERA and a 1.047 WHIP through his first six starts of the season.

WASHINGTON NATIONALS vs. CHICAGO CUBS
Where: Nationals Park
Gametime: 7:05 p.m. EDT
TV: MASN, MLB.tv
Radio: 106.7 FM, MLB.com
Weather: Chance of rain, 53 degrees, wind 14 mph left field to right field

The Washington Nationals recalled right-handed pitcher Jake Irvin from Triple-A Rochester, returned from rehab and reinstated infielder Ildemaro Vargas from the Injured List and optioned infielder Jeter Downs to Triple-A Rochester on Wednesday. The Nationals optioned right-handed pitcher Cory Abbott on Tuesday. Nationals President of Baseball Operations and General Manager Mike Rizzo made the announcements.

Irvin, 26, is scheduled to start and make his Major League debut tonight against the Chicago Cubs. He joins the Nationals after beginning the season with Triple-A Rochester. In his last start on April 26 against St. Paul (MIN), Irvin struck out six in 5.1 innings and allowed two runs on five hits and three walks. In five starts for the Red Wings in 2023, Irvin is 2-2 with a 5.64 ERA (14 ER/22.1 IP), working at least 5.0 innings in four of his last five outings since April 8.

A native of Edina, Minn., Irvin was selected by the Nationals in the fourth round of the 2018 First-Year Player Draft from the University of Oklahoma. In four Minor League seasons, he is 11-14 with a 3.80 ERA in 65 games (61 starts).

Irvin was added to Washington’s 40-man roster following the 2022 season and has the “Best Control” in Washington’s system, per Baseball America. With his start today, he will become the 25th pitcher drafted/signed and developed by the Washington Nationals to start a game for Washington (2005-pres.).

Vargas returns to Washington after missing 18 games with a right shoulder strain. He played in seven games for the Nationals before his injury going 1-for-12 with a walk and two runs scored. Vargas played in three games on rehab assignment for Triple-A Rochester and went 1-for-10 with a walk.

When it came time to decide who to summon from their farm system to start tonight’s game against the Cubs, the Nationals had options. They could’ve gone with someone with considerable big league experience (Wily Peralta), modest big league experience (Paolo Espino) or minimal big league experience (Cory Abbott, Joan Adon).

In the end, they went with zero big league experience.

That’s right, when they take the field this evening, the Nationals will be led by Jake Irvin, a 26-year-old right-hander making his major league debut. It’s a debut most assumed would come sometime this season but few figured would come this soon.

“His last outing, he pitched really well,” said manager Davey Martinez, referencing the two runs Irvin allowed in 5 1/3 innings for Triple-A Rochester one week ago. “He’s stretched out to about 90 pitches. So we’re going to give him an opportunity to come out here and start for us tomorrow, and see what he does and see where he goes.”

A fourth round pick in the 2018 draft out of Oklahoma – where he was rotation mates with 2020 first round pick Cade Cavalli – Irvin is the organization’s 20th ranked prospect according to MLB Pipeline. He missed all of the 2021 season following Tommy John surgery and split last season between Single-A Wilmington and Double-A Harrisburg.

One-plus months into this season, Davey Martinez’s offensive philosophy has become pretty well established, certainly when it comes to his regular 8-9-1 hitters: If CJ Abrams gets on base and there’s an opportunity to play for one run, Victor Robles and/or Alex Call will probably be asked to bunt.

It happened twice tonight, in both the third and fifth innings, and the end result of all that was one run. One that was made possible only because of an error on Robles’ sacrifice bunt attempt in the third.

As such, when Abrams, Robles and Call came back to the plate in the bottom of the seventh, this game was now tied. This time, each was allowed to swing away. And lo and behold, would you guess what happened next? Each delivered a clutch hit, combining to drive in three runs and propel the Nationals to a cathartic, 4-1 victory over the Cubs.

"It's nice to bunt, but you think about giving up outs," Martinez said when asked what made the strategy in the seventh different from the third and fifth. "At that particular moment in the seventh, I said: Hey man, we need to put some runs on the board. And they're swinging the bats well. So you give them a chance to swing. And they came through, which was awesome."

Abrams’ single to right, which brought Dominic Smith home from second, provided the go-ahead RBI. Robles’ infield single, a sharp chopper to third that ate up Patrick Wisdom, kept the rally going. And Call’s double to the gap in left-center brought both of his teammates home and provided the entire dugout reason to celebrate a three-run rally.

On the heels of an impressive 4-2 road trip to Minnesota and New York, the Nationals have sputtered back home. They’re currently 1-3 against the Pirates and Cubs and in danger of assuring another losing homestand if they can’t get things together quickly.

A victory tonight would certainly help. And some offense would certainly help make that more possible.

The Nats were held to one run on six hits Monday night by Drew Smyly and a couple of relievers. They’ll need to be better against Hayden Wesneski, who enters with a 5.24 ERA but has actually pitched quite well in two of his last three starts. The 25-year-old right-hander held the Athletics to one run over seven innings, then held the Padres to one run over five innings last week. He’s averaging only 75.8 pitches per start, so he probably won’t be around too long tonight, if the Nats can make him work a bit.

Trevor Williams gets the ball for the Nationals, facing one of his former teams for the second straight outing. The right-hander had maybe the worst of his starts to date in New York last week, allowing four runs on nine hits over five innings, a performance that kind of got lost in the shuffle because of CJ Abrams’ late grand slam and Mason Thompson's struggles after that during a 9-8 loss to the Mets.

WASHINGTON NATIONALS vs. CHICAGO CUBS
Where: Nationals Park
Gametime: 7:05 p.m. EDT
TV: MASN, MLB.tv
Radio: 106.7 FM, MLB.com
Weather: Chance of rain, 56 degrees, wind 11 mph left field to right field

The identity of the Nationals’ starting pitcher for Wednesday’s game against the Cubs remains a mystery, but Davey Martinez insists the big reveal is coming.

“We’ll announce it after the game,” the manager said this afternoon. “Let’s get through today first.”

Here’s what we do know:

* The Nationals already needed a fill-in starter to account for Friday’s rainout and Saturday’s doubleheader, which created six games in five days on the schedule.

* They’ll need to account for more than just a fill-in start after Chad Kuhl landed on the 15-day injured list with a right foot ailment, though Kuhl’s spot in the rotation won’t come up until Monday in San Francisco.

No two players recover from the same injury in the same amount of time. Sometimes, one player doesn’t recover from the same injury suffered twice in the same amount of time.

At the moment, though, it’s taking a few members of the Nationals organization longer to return from the injured list as anyone probably hoped when the season began.

Atop that list is Corey Dickerson, the veteran outfielder who strained his left calf April 1 and doesn’t appear close to coming back.

Dickerson, signed over the winter for $2.25 million to be the Nationals’ starting left fielder, hurt himself in the second game of the season and hasn’t made it back yet. Though he has been able to hit and playing with no issues, he has not been cleared to run yet.

“This is recurring for him: He did it last year,” manager Davey Martinez said. “This is the same spot. So we want to make sure it’s completely gone.”

On the heels of an eye-opening, 10-strikeout dismantling of the Mets last week, and in the wake of Josiah Gray’s latest impressive start Sunday afternoon, MacKenzie Gore took the mound at Nationals Park tonight with a good chunk of those in attendance expecting another good start.

When it didn’t happen, it didn’t necessarily shock anyone. But it was disappointing nonetheless, which perhaps is as good an indication as anything how high Gore has set the bar in his first month pitching for this organization.

During a 5-1 loss to the Cubs, Gore lasted only three batters into the fifth inning. He allowed four runs, surrendered seven hits, walked two and threw a whopping 102 pitches.

"You don't expect him to get hit," first baseman Dominic Smith said. "You can't take away anything from (the Cubs). They played well tonight. But I still would take MacKenzie 10 out of 10 times. He knows what he can do. We know what he can do. He's going to make probably 25 more starts. I'm pretty sure he's going to be dialed in for all of those."

Though Smith did his part with three hits, the rest of the Nationals didn’t exactly provide a lot of support for their starter. They managed only six hits off Cubs left-hander Drew Smyly and too often made outs on three or fewer pitches, rarely giving Gore time to catch his breath in the dugout before re-taking the mound.

The Nationals placed Chad Kuhl on the 15-day injured list with an injury to his right foot and recalled Cory Abbott from Triple-A Rochester to take his spot on the active roster and potentially his spot in the rotation.

Kuhl hurt himself during Saturday night’s game while delivering a pitch, stepping into the divot on the mound created by Pirates pitcher Vince Velásquez and causing a shooting pain in his big toe. Manager Davey Martinez and director of athletic training Paul Lessard came out from the dugout to check on him, but Kuhl threw one warm-up pitch and said he was fine to continue.

He wound up being removed in the fourth inning, having thrown 100 pitches while getting roughed up for eight runs on seven hits and four walks in what wound up a 16-1 blowout loss.

“It’s one of those things where I was like: I tore my elbow (in 2018) and finished the inning. I’m not going to let my toe derail the start and have me only go two innings,” he said. “It’s something you just try to fight through. It ended up not working out too great for me anyway, but I did my best to keep getting outs. It’s just unfortunate.”

Kuhl’s toe was still bothering him Sunday, so he was examined by doctors, who diagnosed with him with metatarsalgia (pain in the ball of the foot), leading to this IL stint.

One month into the season, we can pretty much divide Nationals games into two categories: Games started by Josiah Gray and MacKenzie Gore, and games started by everyone else. That doesn’t mean those other games haven’t been interesting, or that the others haven’t pitched well at times. But clearly Gray and Gore starts are the most significant events this team has right now, and most of them have lived up to the hype.

Gray did his part Sunday, allowing one run over six innings to defeat the Pirates. Gore gets his shot tonight when he takes the mound for the series opener against the Cubs. The lefty is coming off a dominant outing in New York in which he struck out 10 and allowed only one run in six innings. Gore faces a new challenge tonight in a Chicago lineup that leads the National League in batting average, on-base percentage and OPS, while ranking second in runs scored.

The Nats lineup will hope to have some success against left-hander Drew Smyly, who nearly made some major history himself two starts ago when he carried a perfect game against the Dodgers into the eighth inning until it was broken up by a little dribbler in front of the mound and Yan Gomes’ inexplicable decision to bowl over his pitcher in pursuit of the ball.

WASHINGTON NATIONALS vs. CHICAGO CUBS
Where: Nationals Park
Gametime: 7:05 p.m. EDT
TV: MASN, MLB.tv
Radio: 106.7 FM, MLB.com
Weather: Chance of rain, 58 degrees, wind 13 mph out to center field

NATIONALS
LF Alex Call
2B Luis García
3B Jeimer Candelario
DH Joey Meneses
C Keibert Ruiz
RF Lane Thomas
1B Dominic Smith
CF Victor Robles
SS CJ Abrams

The Washington Nationals recalled right-handed pitcher Cory Abbott from Triple-A Rochester and placed right-handed pitcher Chad Kuhl on the 15-day Injured List (retroactive to April 30) with right foot metatarsalgia on Monday. Nationals President of Baseball Operations and General Manager Mike Rizzo made the announcement.

Abbott, 27, joins the Nationals for the first time this season after beginning the season with Triple-A Rochester. In his last start on April 28 against St. Paul (MIN), Abbott struck out 12 in 5.2 innings and allowed just one hit and three walks. For his efforts, he was named International League Pitcher of the Week. In five starts for the Red Wings in 2023, Abbott is 1-3 with a 6.46 ERA (17 ER/23.2 IP). Over his last three starts, Abbott has struck out 24 in 13.2 innings.

Abbott was selected off waivers from the San Francisco Giants on May 4, 2022 and was recalled for the first time on June 17. He went on to enjoy five stints with Washington, making nine starts (0-5, 6.00 ERA, 36 SO) and seven relief appearances (2.00 ERA, 9 SO). He held opponents to a .186 average at home and struck out a total of 13 in his final two starts (seven in 5.0 IP vs. Atlanta Sept. 26 and six in 4.0 IP at New York (NL) Oct. 4).

Kuhl, 30, is 0-2 with a 9.41 ERA in five starts with the Nationals in 2023.

It’s either the best or the worst job in baseball, serving as the backup to a No. 1 catcher who plays almost every day. For Riley Adams, it’s reality right now.

With Keibert Ruiz starting as many games behind the plate as any catcher in the majors, Adams is left to watch from the bench. He starts roughly once a week – officially four times in the Nationals’ first 27 games – but has to keep himself physically and mentally ready in case his services are needed at a moment’s notice.

And then he has to actually produce when given the opportunity, no matter how little opportunity he’s had to establish any kind of rhythm.

Given all that, Adams’ performance Saturday afternoon was both notable and impressive. Catching the first half of the Nationals’ doubleheader against the Pirates, he went 2-for-4 with a two-run double while also throwing out a runner trying to steal second off him.

“He did awesome,” manager Davey Martinez said. “He threw the ball down, we got a big out on the stolen base. And he swung the bat well, too. It was awesome. He had a good day.”