Entering the game in relief of starter Megill, José Buttó allowed consecutive two-out hits, including an RBI single. Then, a three-run home run by Washington Nationals catcher Riley Adams, his first of the season, narrowed the Mets’ lead to 7-6.

Dylan Crews homered off Tylor Megill in the second for Washington’s first run. Torrens had an RBI double in the fifth to make it 7-1. Parker, who went five innings and allowed all seven Mets runs, saw his ERA climb to 2.65.

Francisco Alvarez’s two-run homer was all the Mets needed in a 2-0 win. As often happens, the Nationals struggled to get the ball in the air.

The Mets are going to be without one of their left-handed relievers for at least the next few weeks, after A.J. Minter was placed on the 15-day injured list with a left lat strain on Sunday. Right-han

Minter, 31, is 0-0 with a 1.64 ERA and seven holds in his first season with the Mets. “I’m just glad it wasn’t my elbow,” he said Saturday.

The New York Mets activated catcher Francisco Alvarez and second baseman Jeff McNeil from the injured list Friday, and both were in the lineup to make their season debut in the opener of a four-game series against the Washington Nationals.