The Rockies scratched Opening Day starter Jhoulys Chacin from his start in a split-squad game against the Rangers on Friday because of back spasms he suffered Thursday. The club said the injury is not serious, and the move was precautionary.

Chacin, 25, is still expected to make his first career Opening Day start April 1 at Milwaukee. Manager Walt Weiss announced on Monday that Chacin would start the opener, saying he was impressed with Chacin's professionalism and approach throughout camp.

The Rockies hope for a bounce-back season from Chacin, who went 3-5 with a 4.43 ERA in a 2012 season interrupted by a nerve injury in the right side of his pectoral muscle.

Chacin was 0-3 with a 7.30 ERA through five starts in 2012 when the Rockies planned to send him down to Triple-A Colorado Springs, but they then decided to investigate the cause of his drop in velocity and it was discovered he had a right pectoral injury. After spending 97 games on the disabled list, Chacin returned a different pitcher and went 3-2 with a 2.84 ERA in his final nine starts of the season.

This spring, Chacin has devoted himself to working on his fastball and changeup, and he has a 7.00 ERA in three Cactus League starts. He also made one appearance for Venezuela in the World Baseball Classic.

Righty Tyler Chatwood will start the game against the Rangers at 2 p.m. MT in Surprise. Lefty Christian Friedrich is scheduled to start against the Giants at Salt River Fields at Talking Stick.