© 2008 MLB Advanced Media, L.P. All rights reserved.

03/21/08 12:06 AM ET

Belisle sidelined with sore right forearm

Competing for rotation spot, right-hander's prognosis uncertain

FORT MYERS, Fla. -- Reds starting pitcher Matt Belisle has been shut down from throwing because of a sore right forearm, the Reds announced on Thursday.

How did Belisle get hurt?

"He was overpracticing his changeup," manager Dusty Baker said.

Baker did not know how long Belisle would be out of action. He hasn't pitched in a game since last Friday against the Yankees.

"We skipped him a turn and we'll see," Baker said. "From there, it's getting a little tougher to get the endurance back. That kind of set him backwards."

Belisle's injury could end up cementing the makeup of the Reds' rotation with just over a week left in camp. With Johnny Cueto and Edinson Volquez closing in on earning two of the three open spots, one spot seemed left for battle among Belisle, Josh Fogg and Homer Bailey.

Of the three candidates, Fogg has pitched best in camp. Belisle and Bailey have often struggled.

Belisle is 2-0 with a 9.00 ERA in 10 innings over four starts with 16 hits allowed. He has walked five with only three strikeouts.

Mark Sheldon is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.