SAN DIEGO -- Left-hander Brooks Raley will make his Major League debut Tuesday, replacing Matt Garza in the Cubs rotation.
Garza is sidelined indefinitely with a stress reaction in his right elbow, diagnosed on Monday.
Raley, 24, will be the 14th rookie the Cubs have used this season, and seventh pitcher. He was the Cubs' Pitcher of the Month for July after posting a 2.12 ERA (seven earned runs over 29 2/3 innings). He walked 12 and struck out 28, holding opponents to a .254 average. His 2.12 ERA was the fourth-lowest in the Pacific Coast League. He gave up two or fewer runs in each of his five outings while posting three quality starts.
"He's a guy who can pitch in and out, [throws a] cutter, two-seamer, four-seamer, nothing overpowering," Cubs manager Dale Sveum said. "He's not going to probably strike a lot of guys out. He's going to pitch to contact. His command is pretty good, his mound presence is outstanding. His breaking ball [is good], he has a plus changeup. He's a lot like Travis Wood with a breaking ball a work in progress."
A sixth-round pick in 2009, Raley began the season with Double-A Tennessee and was 2-2 with a 3.51 ERA in eight starts, striking out 29 over 48 2/3 innings. He was bumped up to Triple-A Iowa, where he was 4-8 with a 3.62 ERA in 14 starts. He struck out 69 and walked 28 over 82 innings, and opponents were batting .272 against him. In his last start, Thursday, he gave up six runs on 10 hits over six innings.
A roster move will be made on Tuesday, with Garza heading to the disabled list.