Guerra will work out of the bullpen moving forward, Adam McCalvy of MLB.com reports.
Guerra has struggled to a 12.15 ERA over his past four starts, three of which the Brewers lost, so he'll head to the bullpen while newly-acquired Gio Gonzalez takes his place in the rotation. The right-hander owns a 4.27 ERA and 128:55 K:BB across 26 starts this season (135 innings). He'll remain an option to start down the stretch should an opportunity arise, though he'll work primarily as a long reliever.
