The Nationals scratched left fielder Michael Morse just before tonight’s game with right knee soreness, an ailment he felt as he went through his final warm-up for the game. The Nationals will check on Morse before Thursday’s game to determine if he can play.

“Right before the game, [Morse] indicated to me he did something pregame, he just couldn’t shake,” Riggleman said. “I guess he was going to try to play through it. He just said, ‘You know what, this is not feeling good.’ He let me know that, and we made the change.”

Morse wanted to play, Riggleman said, but Riggleman thought it would be more prudent to sit Morse rather than start him and have to pull him out if he aggravated the injury.

Riggleman said he will also have to check with Jerry Hairston, whom Riggleman said is “limping around a little bit.” Hairston, though, insisted he is fine after the game.

Hairston has been the primary replacement for Ryan Zimmerman at third base. Tonight, Hairston played center field for Rick Ankiel, who sat out with a right wrist injury that could be healed enough for him to play by tomorrow.

Tonight, Laynce Nix replaced Morse and went 1 for 4. Alex Cora, who played third tonight, went 3 for 4 with three singles.