The Dodgers placed Treinen on the 15-day injured list Saturday due to right elbow inflammation.
Treinen seemed to be rounding into form for the Dodgers, posting a 2.61 ERA and 1.16 WHIP to go along with three wins and a save over his last 13 appearances, but his campaign is now on hold due to the elbow injury. Chayce McDermott was called up from Triple-A Oklahoma City to replace Treinen on the active roster and in the Los Angeles bullpen.