On March 20, 2011 — White Sox P Jake Peavy is diagnosed with rotator cuff tendinitis and his return to action is uncertain. Peavy has been very effective when he has been able to pitch since the Sox acquired him in a trade with the Padres in 2009, but he has spent most of his time in Chicago on the disabled list.
Sources –
Baseball Reference March 20
SABR Games Project
National Pastime March 20
Retro Sheet
Replay The Game