Exelby’s contract is worth $600,000 at the NHL level and $130,000 at the AHL level. MacDermid’s contract is worth $600,000 at the NHL level and $70,000 at the AHL level.
Exelby spent the 2011-12 season with the Grand Rapids Griffins of the American Hockey League after signing with the Detroit Red Wings as an unrestricted free agent on July 5, 2011. In 75 games, he had seven goals, 14 assists and 177 penalty minutes with a plus-8 rating.
The 30-year-old has played 408 career NHL games with the Atlanta Thrashers and Toronto Maple Leafs. He has seven goals and 43 assists with 584 PIMs.
MacDermid appeared in five games with Boston during the 2011-12 season. The 22-year-old also played for the AHL Providence Bruins, where he had four goals, 12 assists and 121 PIMs in 69 games.
Thursday the team announced it had signed defenseman Matt Bartkowski to a one-year, two-way contract worth $600,000 at the NHL level and $62,500 at the AHL level.
Bartkowski, 24, played the first three games of last season with the Burins before being sent to Providence, where he had 22 points in 50 games.