Turnbow saved 63 games for the Brewers in the 2005-2006 seasons, but has been limited to a total of 30 2/3 innings in the majors and minors combined the past two seasons because of shoulder trouble. He recently auditioned for teams in Arizona and clocked better than 93 mph on the radar gun.
The Diamondbacks, Rockies and Dodgers had all expressed interest in Turnbow, who signed a minor league deal with an invitation to Florida's big league camp.
Leo Nunez, who saved 26 games last year, is expected to be Florida's closer this season, but the Marlins have a history of success with low-cost acquisitions at the back end of the bullpen. The often-injured Kiko Calero re-established himself with a 2-2 record, 1.95 ERA and 69 strikeouts in 60 innings last season in Florida.
Jerry Crasnick is a senior writer for ESPN.com.