Career
He played college football for the Texas Technology He signed his first NFL contract with the Vikings after spending the 2014 season with the Arizona Rattlers of the Arena Football League (American Federation of Labor-Congress). Born in Florida, Mackey moved to Wilmington, Delaware where he was a standout defensive end at Christiana High School.
He spent the 2008 campaign at Hargrave Military Academy, where he was considered a four-star prospect by Scout.com.
He selected South Carolina after originally committing to Clemson and turning down offers from Arkansas and North Carolina, among others He originally signed with Virginia Technical, but failed to qualify academically.
Mackey began his collegiate career at Hinds Community College in Raymond, Mississippi before transferring to Texas Technical 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 Technical in 2012, Mackey earned All-Big 12 honorable mention. Arizona Rattlers
Mackey spent the 2014 season with the Arizona Rattlers of the Arena Football League (American Federation of Labor-Congress). 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.
