Thielbar's contract was purchased by the Marlins on Monday, Mike Berardino of the St. Paul Pioneer Press reports.
Thielbar spent 2016 playing independent ball and performed quite well, piecing together a 2.39 ERA and 1.02 WHIP across 64 innings pitched in relief. The left-hander has a good amount of big league experience as a member of the Twins bullpen from 2013 to 2015 with some success, but his unimpressive strikeout abilities could limit his ceiling if he sticks with the team out of spring training.