Nicasio's start bumped to Sunday

DENVER -- By calling up Tyler Chatwood to pitch Saturday, the Rockies will give right-hander Juan Nicasio an extra day's rest. Nicasio, who has struggled on and off this season, will start Sunday in the finale of the four-game set with the Giants.

Nicasio (3-1, 5.13 ERA) threw six innings in his last start -- the longest he's lasted since his first start of the season. However, he gave up five early runs in a 5-1 loss to the Cubs at Wrigley Field. Nicasio is a power pitcher who is searching for the sharpness that could make him highly effective.

Rockies manager Walt Weiss said the club sees the potential during bullpen sessions.

"Juan is clear as far as the things he needs to work on," Weiss said. "He throws great bullpens. It's a matter of taking that into the game."