Matusz (back) was placed on the 15-day DL on Sunday, Eduardo Encina of the Baltimore Sun reports.

EDGE Analysis

Matusz's DL stint is backdated to March 25, so he'll be eligible for activation as soon as April 10. He's set to pitch in middle relief for the Orioles after putting together the best season of his career in 2015, tallying a 2.94 ERA, 1.18 WHIP, and 56:20 K:BB ratio over 49 innings.