Mackey began his collegiate career at Hinds Community College in Raymond, Mississippi before transferring to Texas Tech in 2011, where he played for two years. At Hinds, Mackey in nine games for Head Coach Gene Murphy, recording 47 tackles (36 solo), 15.5 tackles for a loss of 53 yards, 4.5 sacks for a loss of 19 yards and forcing one fumble. He received first-team All-conference honors.
In his final season at Texas Tech in 2012, Mackey earned All-Big 12 honorable mention.
Mackey spent the 2014 season with the Arizona Rattlers of the Arena Football League (AFL). Mackey recorded a half sack in two regular season games with the Rattlers in 2014 before recording three sacks in the playoffs, helping the Rattlers win the ArenaBowl XXVII Championship Title.
Minnesota Vikings
On January 5, 2015, Mackey was signed by the Minnesota Vikings of the National Football League (NFL) in recognition of his "athleticism," "explosive" ability, "effort," and "determination" demonstrated in both his 2014 stints with the Indoor Football and later Arena Football Leagues, and in his 2015 Vikings tryout. "[2]
Mackey was assigned to the Baltimore Brigade on January 19, 2017.[3] He was placed on recallable reassignment on March 31, 2017. On July 8, the Rattlers defeated the Sioux Falls Storm in the United Bowl by a score of 50–41.[4]
Mackey would make his MMA debut against Brant Campbell at LFA 188 on July 12, 2024.[5] He would lose the fight via technical knockout in the second round.[6]
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