Boxberger signed a minor-league contract with the Brewers on Sunday as a non-roster invitee, Kiley McDaniel of ESPN reports.
Boxberger made 23 relief appearances for the Marlins in 2020, posting a 3.00 ERA and 1.39 WHIP over 18.0 innings. He'll now join his fifth team in as many seasons and will compete for a major-league roster spot with the Brewers during spring training.