The Rangers are placing Kumar Rocker on the 15-day injured list with a right shoulder impingement, manager Bruce Bochy told the team’s beat (including Shawn McFarland of The Dallas Morning News). Gerson Garabito has been recalled to add an extra bullpen arm for the time being.
Spring Training injuries to Cody Bradford and Jon Gray opened the door for Rocker to begin the season as the fifth starter. The former #3 overall pick had blitzed through the minor leagues late last season. Rocker was utterly dominant following his return from Tommy John surgery, posting a 1.96 ERA with 55 strikeouts over 36 2/3 minor league innings. He held his own over his first three MLB starts, allowing five earned runs with 14 punchouts across 11 2/3 frames.
It has been a completely different story through the first month of this season. Rocker has been hit hard in three of his five outings. None was worse than last night’s start in Sacramento. Rocker failed to make it out of the second inning while giving up five runs in a loss to the A’s. He has surrendered an 8.10 earned run average overall. He’s striking out just 16.8% of opponents. His swinging strike rate — which had sat at a plus 13.3% mark over his three MLB appearances last September — is down to 10.8%. Rocker’s fastball is still sitting above 95 MPH on average, but the stuff clearly hasn’t been sharp.
Bochy didn’t provide a timeline for Rocker’s return. He’ll be out for at least a couple weeks, and it’s possible the Rangers will option him back to Triple-A Round Rock once he’s healthy. Patrick Corbin is in the major league rotation after his late signing delayed his season debut by a couple weeks. Jacob deGrom, Nathan Eovaldi and Tyler Mahle are at the top of the staff. Jack Leiter is on the IL because of a blister, but he made it through 4 2/3 scoreless innings during a rehab start on Tuesday. There’s a good chance he’ll be activated for Sunday’s game in San Francisco. He has worked 10 innings of one-run ball over his first two starts.