Rea was assigned to minor-league camp Monday, Curt Hogg of the Milwaukee Journal Sentinel reports.
Rea will head to Milwaukee's farm system to serve as pitching depth after spending the 2022 season in Japan with the Fukuoka Softbank Hawks. His last big-league experience dates back to 2021 when he made one appearance for Milwaukee, though he also pitched in 20 contests during the 2016 season across stops in Miami and San Diego.