The Braves placed veteran reliever Jason Frasor on the 15-day disabled list Tuesday with a right shoulder sprain. He is scheduled for a cortisone shot Wednesday.

“(I) pitched Saturday. Sunday, something was wrong and I couldn’t pitch,” Frasor said Tuesday. “I’ve never had a shoulder injury in my life. … I don’t have anything to compare it to, but it hasn’t gotten better since Sunday. But that’s why we’re getting a shot.”

Manager Fredi Gonzalez said Frasor’s shoulder “(didn’t) look bad” in an MRI taken Monday.

“It just doesn’t feel right,” Gonzalez said. “So we’re going to shut him down and hopefully it’s nothing serious.”

The Braves signed Frasor July 16 after the Royals released him earlier that week. He’d compiled a 1.54 ERA over 26 games with Kansas City.

He has thrown 4 2/3 scoreless innings in six appearances as a Brave while striking out four. He picked up two holds, working primarily in the seventh and eighth innings.

“It’s the way it goes,” Frasor, 37, said. “It’s not even so much if I was pitching well or pitching bad. It’s just there’s two months left and I’ve never had a shoulder issue and now I have it. It especially stinks joining a new team, which you want to impress. You want to do well. They acquired you, you want to help, you want to help the team win. But it wasn’t meant to be.”

The Braves called up Ryan Kelly to fill Frasor’s roster spot. Kelly has a 6.75 ERA over three appearances with the Braves this season, while he’s 4-2 with a 0.87 ERA and 18 saves in Triple-A and Double-A.