Perez was 0-1 with a 4.56 ERA in six starts on a rehab assignment at Double-A Frisco and Round Rock. He last pitched on Sunday night for Round Rock and allowed five runs on 12 hits in six innings. He did not walk a batter and struck out six while throwing 96 pitches.
Perez was 4-3 with a 4.38 ERA in eight starts a year ago and has a career Major League record of 15-13 with a 4.13 ERA in 40 games (34 starts).
T.R. Sullivan is a reporter for MLB.com. Read his blog, Postcards from Elysian Fields, follow him on Twitter @Sullivan_Ranger and listen to his podcast. This story was not subject to the approval of Major League Baseball or its clubs.