Seattle placed Woo on the 15-day injured list Tuesday with right forearm inflammation.

EDGE Analysis

The severity of the issue is unclear, but Woo will miss at least a couple of turns through the rotation. The 23-year-old right-hander has turned in a 4.75 ERA, 1.24 WHIP and 60:17 K:BB in his first 11 major-league starts covering 55 innings. Emerson Hancock is likely to be called up from Double-A Arkansas to replace Woo in the rotation on Wednesday versus the Padres.