The Brewers declined Rea's $5.5 million club option for 2025, Adam McCalvy of MLB.com reports.
The Brewers placed Rea on waivers Saturday, Curt Hogg of the Milwaukee Journal Sentinel reports.
Rea came away with a no-decision in Friday's 7-4 loss to the Diamondbacks, giving up three runs on five hits and a walk over four innings. He struck out four.
Rea will start Friday's game versus the Diamondbacks, Adam McCalvy of MLB.com reports.
Rea is not listed among the Brewers' probable starters for their upcoming series versus the Diamondbacks and could be shifted to a relief role ahead of the postseason, Adam McCalvy of MLB.com reports.
Rea (12-5) was tagged with the loss against the Giants on Wednesday, allowing 10 runs on 11 hits and one walk over four innings. He struck out one.
Rea didn't factor into the decision in the first game of Friday's doubleheader against Cincinnati, allowing four runs (three earned) on six hits over four innings. He struck out five.
Rea (10-3) picked up the win Tuesday, allowing five hits and a walk over seven scoreless innings in a 10-0 rout of Atlanta. He struck out nine.
Rea (9-3) allowed two runs on five hits and a walk while striking out seven over 5.2 innings to earn the win Sunday over the Nationals.
Rea is expected to serve as a bulk reliever behind opening pitcher Rob Zastryzny in Sunday's game against the Nationals, Todd Rosiak of the Milwaukee Journal Sentinel reports.