Keller (shoulder) will begin a rehab assignment Wednesday with Triple-A Omaha, Anne Rogers of MLB.com reports.

EDGE Analysis

Keller might need multiple outings on the farm given that he's been sidelined since May 19 because of right shoulder impingement syndrome. The 27-year-old had pitched to a 4.36 ERA, 1.87 WHIP and 31:40 K:BB in 43.1 innings prior to the IL stint.