Boyes was put on waivers earlier in the week and bought out Wednesday once he cleared. He had 21 goals for the Panthers two seasons ago, but dropped to just 14 goals in 78 games this past season.
The Panthers signed goalie Mike McKenna to a two-year, two-way contract. McKenna spent last season with Portland of the AHL, and is 5-11-2 with a 3.48 goals-against average in limited NHL action with Tampa Bay, New Jersey, Columbus and Arizona.
Forward Shane Harper and defenseman Sena Acolatse were signed to one-year, two-way deals. Neither has appeared in an NHL regular-season contest.