PITTSBURGH -- Struggling Cincinnati Reds right-hander Homer Bailey has halted his injury rehabilitation assignment at Triple-A Louisville.

Bailey made one start for Louisville and allowed five runs in three innings Monday. He has been on the disabled list with right knee inflammation since May 30, and interim manager Jim Riggleman said before Friday night's game against the Pirates that Bailey informed the Reds that he is not healthy enough to pitch.

"This is his call," Riggleman said. "He pulled himself off of the rehab. He just wasn't feeling right. I'm not sure what the details are. He just wasn't feeling right and wanted to stop the clock running on his rehab time. That's what we're going to do."

In 12 major leagues starts this season, Bailey is 1-7 with a 6.68 ERA. He pitched no-hitters in both 2012 and 2013 for the Reds but has been limited to 38 starts over the past four seasons because of arm injuries.

Bailey, 32, is making $21 million this season in the fifth year of a $105-million, six-year contract.

The Associated Press contributed to this report.