Manager Mark Kotsay said that Wilson, who is out of the lineup Sunday against the Tigers, is dealing with patellar tendinitis in his knee, Martin Gallegos of MLB.com reports.
Kotsay added that the injury is manageable, and he expects Wilson to be back at shortstop Tuesday in Cincinnati after Monday's team off day. It's unclear when the 24-year-old sustained the injury, but he's been struggling at the plate over the past nine games, batting just .162 (6-for-37) with two doubles, on steal, two RBI and three runs. Alika Williams will fill in at shortstop Sunday for the Athletics.