NEW YORK – Before starting a three-game series against the Mets tonight, the Nationals answered a question that had been lingering since Sunday night: Who would fill the open roster spot?

After Sunday’s loss to the Rangers, the Nats optioned Nasim Nuñez to Triple-A Rochester, requiring a corresponding move when they arrived at Citi Field. The answer: Andrés Chaparro was officially recalled from Rochester in hopes he'll provide the Nats a much-needed right-handed boost.

“Very happy to be back in a major league clubhouse,” Chaparro said, via interpreter Mauricio Ortiz. “And it's also a lot of emotions because of what I went through last year with my baby. But again, happy to be back.”

What the 26-year-old and his family went through last year with his baby was an unbelievable tragedy. After his daughter, Gio Andrea, was born prematurely at the end of the season, she sadly passed away in late October.

That surely put his baseball life in the back seat. But Chaparro entered spring training with a good chance to make his first Opening Day roster, only to have that chance ripped away from him after a good camp when he injured an oblique muscle.

NEW YORK – After a 2-4 homestand, the Nationals are back on the road for a quick trip to Citi Field to play three games against the Mets. The Nats are actually a respectable 15-17 on the road this season. But they’re only 3-7 in away games against their National League East rivals.

The Nats have the right man on the mound for tonight’s opener as they try to get back to their winning ways. MacKenzie Gore has been nothing short of excellent to start this season, with a 2.87 ERA, 1.142 WHIP and major league-best 12.9 strikeouts per nine innings. The lefty has only been charged with a total of three runs over his last four starts, including back-to-back shutout performances over 13 innings against the Mariners and Cubs.

But perhaps more important for the Nationals is what they do against the guy who takes the mound for the other team. Griffin Canning has been impressive to start his first year in New York. The veteran right-hander is 6-2 with a 2.90 ERA and 1.322 WHIP over his 12 starts. And he’s coming off an impressive six shutout innings with seven strikeouts against the Dodgers his last time out.

The Nats did make a roster move this morning to help the offense: They officially recalled Andrés Chaparro from Triple-A to take the roster spot of Nasim Nuñez, who was optioned to Rochester after Sunday’s game.

But wait, the Nationals weren’t done. They also claimed right-hander Ryan Loutos off waivers from the Dodgers this afternoon and optioned him to Rochester, filling the 40-man roster.