The 24-year-old experienced tightness in his pitching arm late in spring training and was expected to begin the season on the DL. He went 9-10 last season with a 4.04 ERA and is 18-16 with a 3.90 ERA in 54 career games with the White Sox.
Chicago placed right-hander Juan Minaya (right abdominal strain) and outfielder Charlie Tilson (stress reaction in right foot) on the 10-day DL. The White Sox also selected the contracts of veteran catcher Geovany Soto, infielder Cody Asche and right-gander Anthony Swarzak from Triple-A on Sunday.
Chicago opens against Detroit on Monday.
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