He played college football at Toledo, and was signed by the Green Bay Packers as an undrafted free agent in 2014.

He finished his career with 47 games (12 starts), 124 tackles (22½ for loss), 16 sacks, 6 forced fumbles and 4 passes defensed.

[1] He was one of two undrafted players to make the Packers' opening day roster after posting 5 sacks in the preseason.

Also had 1 sack his 1st year Elliott earned an NBC game ball during the Packers' September 20, 2015, win against the Seahawks on Sunday Night Football.

[3] On September 3, 2017, the Dallas Cowboys acquired Elliott from the Packers in exchange for a 2018 conditional seventh-round pick (not exercised), to provide depth at linebacker while Anthony Hitchens recovered from a tibial plateau fracture in his right knee and Damien Wilson resolved legal pending issues and a probable suspension.

[11] After the AAF suspended football operations, Elliott signed with the Miami Dolphins on April 9, 2019.