"My thumb is better today," Peralta said. "I went to the training room and today I saw the doctor early in the morning. Everything is fine, but it was a little scary last night."
He was taken out of Tuesday night's game in the top of the fourth inning after he aggravated the thumb on a swing in the second inning. Peralta finished the at-bat with a strikeout and played the third inning at third base before he was removed from the game.
"In that situation, the pitcher threw a changeup and I saw the ball pretty good," Peralta said. "I tried to take a good swing and I swung a little harder than what I usually swing."
Peralta initially injured the thumb in Spring Training fielding a ground ball and had surgery to repair it soon after. He missed 57 games as a result.
Since coming off the disabled list, Peralta has hit .237 with three home runs and 11 RBIs. He had a five-game hitting streak end with his 0-for-1 on Tuesday. Greg Garcia was in the lineup Wednesday night as Peralta's replacement at third base.
"They don't want me to do anything today," Peralta said. "Just the training and doing what I need to do with my hand. [Thursday] morning when I come here we'll see about my swing and we'll figure it out before the game."
Nick Krueger is a reporter for MLB.com based in St. Louis. This story was not subject to the approval of Major League Baseball or its clubs.