The Brewers placed Fitzpatrick (elbow) on the 15-day injured list Saturday, Curt Hogg of the Milwaukee Journal Sentinel reports.
The results of Fitzpatrick's MRI are still unknown, though the Brewers have already determined that the 26-year-old lefty will need to spend time on the injured list. Drew Rom was selected from Triple-A Nashville in a corresponding move to fill the void in Milwaukee's bullpen.