"Figaro's hurt, so we need another starter again," manager Ron Roenicke said. "The problem is if we go to the bullpen, to [Tom] Gorzelanny, we don't really have a long guy to come up and fill those spots."
Roenicke said Figaro was first hurt three starts ago against the Marlins after laying down a bunt and colliding with Miami catcher Rob Brantly. Figaro felt it again in his last start against the Braves on Sunday.
Figaro began the year in the Brewers' bullpen, but has started five games due to several pitching staff injuries. He is 1-2 with a 4.62 ERA.
Hellweg went 7-4 with a 2.82 ERA in 14 starts this season for Nashville and is the club's third-ranked prospect, according to MLB.com.
Kevin Massoth is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.