Perez (8-9) gave up six runs on five hits and three walks over six innings while striking out five in Sunday's loss to the Rays.
The lefty continues to be plagued by big innings, as a five-run fourth put the Rangers in a hole they couldn't climb out of. Perez has now been charged with four or more runs in a single inning five times in his last nine starts, leading to a bloated 5.96 ERA over that stretch. He'll have a hard time snapping out of his funk in his next start at home Saturday against the dangerous Indians.