Jason Heyward was placed on the 15-day disabled list for recurring soreness in his right shoulder, the latest in a series of injury setbacks for the Braves' prized right fielder.

Injuries are mounting for the Braves, who didn't want to go into the two-day Pittsburgh series that starts Tuesday not knowing if Heyward would be ready.

They purchased the contract of outfielder Wilkin Ramirez from Triple-A Gwinnett, creating a 40-man roster spot for Ramirez by moving relief pitcher Peter Moylan from the 15-day DL to the 60-day DL.

Moylan had back surgery last week and is expected to be sidelined for about three months.

The Braves will likely go with hot-hitting Joe Mather in right, although Ramirez could see some playing time. Ramirez, 25, was hitting .248 with 15 extra-base hits (seven homers), 16 RBIs and six stolen bases in 33 games at Gwinnett, with a .513 slugging percentage but a skimpy .294 on-base percentage.

Heyward was diagnosed with rotator-cuff inflammation in his non-throwing shoulder last week and got a cortisone shot. He missed five starts, returned to play three full games, then aggravated the shoulder in batting practice Friday.

He was used for defense in the final inning of Saturday's 12-inning, 5-4 win against the Angels.