Perez (1-3) took the loss Wednesday against the Brewers, allowing nine runs on 11 hits and a walk over five innings. He struck out four.
Perez allowed four earned runs on eight hits and no walks while striking out five across five innings Wednesday against the Angels. He did not factor into the decision.
Perez pitched six innings in a no-decision against the Giants on Saturday, allowing one unearned run on four hits and two walks over six innings while striking out four.
Perez (1-1) picked up the loss Sunday against the Red Sox, allowing four runs on six hits over four innings. He walked four and struck out seven.
Perez didn't factor in the decision Tuesday after he gave up one run on six hits and no walks over eight innings during a 5-3 loss to the Tigers. He struck out seven.
Perez didn't factor into the decision against the Marlins on Friday, allowing one run on six hits and three walks over 4.1 innings while striking out two.
Perez signed a one-year, $8 million contract with the Pirates on Monday, Jason Mackey of the Pittsburgh Post-Gazette reports.
Perez was credited with his second hold of the season in Sunday's 9-8 win over the Mariners after striking out a batter and allowing two earned runs on one hit and two walks over 1.2 innings out of the bullpen.
Manager Bruce Bochy said it's "fair to say" Perez (10-4) may have worked his way back into the Rangers' starting rotation after the lefty allowed three hits and one walk with five strikeouts over 4.2 scoreless innings to earn the win Wednesday against the Red Sox, Jeff Wilson of RangersToday.comreports.
Perez (9-4) earned the win in relief Monday against the Mets, firing two scoreless innings during which he recorded two strikeouts.