"He's been working fast and last time didn't feel as good," manager Mike Matheny said. "The first few times [he threw off the mound] it was like, 'I feel great. I feel great.' Then this time, it was like, 'I feel like I've done more work.' That's just an [indication] that we need to slow down a little bit."
This setback is not comparable to the one that Carpenter dealt with in early February, when numbness and discoloration in his arm forced Carpenter to shut down. This new issue was described as soreness resulting from Carpenter's attempt to push himself through his throwing program as quickly as possible.
Jenifer Langosch is a reporter for MLB.com. Read her blog, By Gosh, It's Langosch, and follow her on Twitter @LangoschMLB. This story was not subject to the approval of Major League Baseball or its clubs.