Line Change
Mackey will make his NHL debut on Saturday.
Mackey was an undrafted free agent who just finished his junior year at Minnesota State University, where he led all of their blueliners with 24 points (7G / 14A) in 36 games. He was named WCHA First team All-Star and finished with a league-high plus-19 rating while helping the Mavericks to a league-best 31-5-2 record.