White Sox pitcher headed for MRI with forearm soreness

Chicago White Sox starting pitcher Martin Perez (54) pitches against the Boston Red Sox during the first inning at Fenway Park. Eric Canha-Imagn Images

Martín Pérez departed Friday's loss in Boston after three innings. The White Sox announced that the lefty experienced forearm soreness that prompted his departure. Pérez said postgame that he’ll go for imaging on Saturday (link via LaMond Pope of The Chicago Tribune).

“I feel sore. I was just trying to be smart and tell them to get me out of the game and see what I got. We have to wait for the MRI tomorrow,” he told reporters. “In the third inning, I started feeling kind of fatigued a little bit. But I feel bad because I don’t want to be in this situation. I want to keep pitching and competing but it is what it is. Wait and see what it’s going to be and the decision and move on.”

Pérez signed a one-year, $5M free agent deal to serve as a veteran presence in an otherwise young rotation. Friday's start was his worst of the season, as he gave up four runs on five hits and a couple of walks without recording a strikeout. Pérez had managed quality starts in two of his first three outings. He carries a 3.15 ERA across 20 innings. His 21.7% strikeout percentage is around league average, but he has walked more than 13% of batters faced.

Davis Martin, Jonathan Cannon and rookies Sean Burke and Shane Smith have joined Pérez in the season-opening rotation. That quintet has made all 19 starts. Pérez and Smith, a Rule 5 pick out of the Milwaukee system, are the only two who have managed decent results. Owen White, Nick Nastrini, Jairo Iriarte, Justin Dunn and Chris Rodriguez make up the rotation at Triple-A Charlotte.

All five have some major league experience. White, Nastrini and Iriarte are on the 40-man roster (as is lefty Jared Shuster, who has moved to multi-inning relief in the minors). Dunn easily leads the Charlotte rotation with 27 strikeouts, but he has also given up a team-high four home runs and has allowed nearly five earned runs per nine. Someone from that group would probably get the call to step into the rotation if Pérez requires an injured list stint. The Sox could also consider building Rule 5 pick Mike Vasil, who is working 2-3 inning stints in mop-up relief, for rotation work.

Mike Clevinger also seems set to join the Charlotte rotation. The Sox outrighted the veteran righty off their 40-man roster this afternoon. Clevinger has the service time to decline the assignment in favor of free agency. Bruce Levine of 670 The Score reports that the Sox intend for Clevinger to build back up as a starter in Triple-A, so it appears he’ll accept the outright and remain in the system. The 34-year-old moved to the bullpen to begin this year. He gave up five runs with eight walks and three strikeouts in 5 2/3 innings before being designated for assignment.