Oakland A's pitcher Brett Anderson had to leave Friday's game against the Tampa Bay Rays because of an ankle injury suffered in the first inning.
It was unclear immediately after Friday's game how long he will be sidelined.,
There was no definitive indication when Anderson was injured. Susan Slusser of the San Francisco Chronicle guesses it may have occurred when he was fielding a ball hit by the Rays' Ryan Roberts, who got an infield single on the play.
Anderson entered Friday's action with a 1-2 record and a 4.34 ERA.