CINCINNATI -- Reds center fielder Billy Hamilton exited Tuesday's 3-1 loss to the Giants before the fifth inning because of a jammed left thumb, the club revealed. Hamilton was replaced by Tyler Holt after going 0-for-2.
Left thumb issues have bugged Hamilton since he first hurt it April 15 while making a spectacular leaping catch to rob the Cardinals' Matt Carpenter of a home run at Busch Stadium.
"He got jammed with a pitch in his first at-bat and it just blew up," Reds manager Bryan Price said.

Hamilton banged the thumb again the following week and missed a few games while his hand was immobilized in a soft cast.
"It gets swollen and makes it really hard for him to swing the bat," Price said. "He'll probably be able to do something [Wednesday], I would imagine. He was pretty much done for the night after that happened and was unusable as an offensive piece."
Entering Tuesday, Hamilton had a three-game hitting streak and hits in six of his previous seven games. He is batting .215 in 23 games this season.