“Looked like it was that oblique area,” Chicago manager Tony La Russa said on Saturday. “All indications are that he tweaked it, and [I'm] not optimistic that he would be available [Sunday]..”
Outfielder Adam Engel was reinstated from the 10-day injured list.
Hamilton was at the plate with one out and a man on second in the bottom of the fourth against Tarik Skubal. Hamilton was noticeably uncomfortable after a few swings in the at-bat, grabbing his side and wincing in pain. Team trainers went out to check on him. Hamilton finished the plate appearance, which ended on a foul-tip strikeout.
Hamilton is hitting .217 with a .672 OPS and 10 RBIs this season.
“It is sad to see Billy go down,” said second baseman Nick Madrigal, who had two hits and drove in a run on Saturday. “He loves to be out there. He's a huge presence to our team, but once that happened, the very next inning, we were locked in right on the game and hoping to pull that one out.”