Rodriguez, 33, will enter his 15th season in the major leagues and is coming off a 38 save campaign in 2015. He finished the season with a 2.21 ERA in 60 games with 62 strikeouts.
Rodriguez has 386 saves in his career, which is the most among active players and seventh best in history. He trails Dennis Eckersley by four saves for sixth on the all-time list.
The Brewers previously traded Rodriguez in July 2013 to the Baltimore Orioles in exchange for minor leaguer Nick Delmonico. He returned to the Brewers after signing as a free agent in March 2015.
The Tigers are expected to pick up $9.5 million remaining on his contract through the 2016 season, reports Heyman.
Betancourt is playing winter ball in Venezuela with the Leones del Caracas. He played 122 games for the Single A Lakeland Flying Tigers and recorded 129 hits and 48 RBIs to finish with a .263 batting average.
- Christopher Chavez