Denver, CO (Sports Network) - The Arizona Diamondbacks have activated right-hander Yusmeiro Petit from the 15-day disabled list to start Saturday's game versus Colorado.

Petit has been shelved since May 9 with a right shoulder strain. He just completed a five-game rehab stint with Triple-A Reno and was 0-1 with a 6.89 earned run average over 15 2/3 innings.

The 24-year-old righty has struggled so far in 2009, posting an 0-3 record to go with an 8.03 ERA in six games, five of those starts.