Ubaldo Jimenez is the odd man out of the Baltimore Orioles' rotation, and he is headed to the bullpen.

Manager Buck Showalter made the announcement before Tuesday's game against the White Sox in Chicago. Jimenez's rotation spot will be take later this week by Miguel Gonzalez, who will be recalled after a short stint in the minors.

"Sure, it was (a difficult discussion), but you have your reasons," Showalter said. "(Jimenez) doesn't have to agree with them, but he's been a great teammate, a great professional. He's got a good heart, and he wants to do well. It's not like he's pitched poorly all year."

Gonzalez, 30, was caught in a roster crunch Aug. 9 when Jimenez came off the 15-day disabled list to rejoin the rotation. Gonzalez was optioned to Triple-A Norfolk to create a spot for Jimenez and has been there since. He will return to start Sunday in Chicago against the Cubs.

Gonzalez is 6-6 with a 3.80 ERA in 20 appearances (19 starts) for the Orioles this season, while Jimenez is 4-9 with a 4.83 ERA in 20 starts.

Jimenez spent 5 1/2 seasons with the Colorado Rockies, then 2 1/2 seasons with the Cleveland Indians before signing a four-year, $50 million free agent deal with Baltimore in February.