Winnik announced his retirement from hockey Thursday.
Winnik landed a professional tryout agreement with the Bruins, the club announced Monday.
Winnik is still looking for goal No. 3 of the season, as his drought reaches 24 games.
Winnik failed to score a goal for the eighth consecutive game during Tuesday's 3-0 win over Philadelphia.
Winnik had five blocks and 1:35 of power play ice time, but did not have a shot on goal in Thursday's win over Chicago.
Winnik's (personal) visa was expedited to allow him to suit up versus Detroit on Thursday.
Winnik may not be able to resolve his visa issues in time for Thursday's road match with the Red Wings.
Winnik signed one-year deal worth $660,000 with Minnesota on Wednesday.
Winnik will be in training camp with the Wild on a PTO, as announced by the team Tuesday.
Winnik scored a goal with a plus-1 rating, six shots on goal and a minor penalty in Friday's 6-3 loss against the Coyotes.