The Reds have placed setup man Jonathan Broxton on the 15-day DL with a strained flexor mass in his right elbow the team announced. He will have surgery that could be season-ending but the full extent of the injury won't be known until the actual procedure.

“They don't know until they get in there and see what's wrong” said manager Dusty Baker to Mark Sheldon of MLB.com. “I'd just be guessing right now until the doctors get in there.”

Broxton 29 left Wednesday night's game with the trainer and said he felt a sharp pain in his forearm. He missed close to two months with a similar injury earlier this season and had been activated off the DL on August 9. Broxton had surgery to remove loose bodies from his elbow in 2011.

In 34 games between injuries Broxton has a 4.11 ERA and 1.27 WHIP in 30 2/3 innings. The Reds signed him to a three-year $21 million contract this past winter with the idea of making him their closer and transitioning Aroldis Chapman to the rotation. Broxton moved into a setup role when Chapman remained the closer.