Rubby De La Rosa has forearm cramp

DENVER -- Rubby De La Rosa, the Los Angeles Dodgers' highly touted rookie right-hander, left Sunday's game with the Colorado Rockies because of what later was diagnosed as a cramp in his right forearm after throwing one pitch in the bottom of the fifth inning.

"It was right in here," De La Rosa said, pointing at an area on the underside of his right arm, just above his wrist. De La Rosa went on to say, with Kenji Nimura interpreting, that his right index finger curled up against his palm and he was unable to straighten it.

De La Rosa said he was told by the team's medical staff that the condition resulted from dehydration and that he should drink more water when he pitches. He is expected to make his next scheduled start on Saturday night against the Houston Astros.

De La Rosa had thrown 83 pitches to that point in his second major league start, and all three of the runs he had allowed had come on a home run by Rockies right fielder Seth Smith with two outs in the first inning. Since then, De La Rosa had given up just one hit and struck out six batters.

Tony Jackson covers the Dodgers for ESPNLosAngeles.com.