ARLINGTON, TEXAS (AP) - Oakland Athletics left-hander Brett Anderson was removed from Friday night's start against the Texas Rangers after two innings with a slightly hyperextended right knee.
His right foot landed in a hole on the mound during his follow-through on a pitch to Julio Borbon in the second.
Anderson fell awkwardly, and a trainer and manager Bob Geren left the dugout to check on Anderson.
After throwing a couple of practice pitches, Anderson remained in the game, but was replaced by right-hander Boof Bonser at the start of the third.
Anderson allowed four runs and six hits.