"Cardinals co-ace Chris Carpenter returned to St. Louis on Tuesday to be examined by nerve specialists after experiencing renewed symptoms associated with a bulging cervical disc.

Carpenter, who threw live batting practice Sunday, experienced what the club has described as "weakness" in his neck, shoulder and upper arm Monday.

As recently as last weekend, the Cardinals hoped Carpenter would be available to make their opening-day start April 4 against the Miami Marlins. That responsibility now falls to Kyle Lohse."