He signed with the Oakland Raiders as an undrafted free agent in 2014, and also played for the Cleveland Browns, the Kansas City Chiefs, and the New York Jets.

[3] He was selected Bay Area News Group athlete of the week after a win over Amador Valley High school football team.

[3] Atkinson was also a standout athlete on the school's track & field team, where he competed as a sprinter.

[8][9] Atkinson and his twin Josh attended the University of Notre Dame, where they played football for the Fighting Irish.

[3] Primarily a backup running back with Notre Dame,[10] Atkinson ran for almost 1,000 yards and scored 10 touchdowns over his three-year career.

Late in the season, he lost playing time to Tarean Folston and Cam McDaniel.

He ran a personal-best time of 6.85 seconds in the 60 meters at the 2012 GVSU Big Meet, placing third in the prelims.

[19] He played in five games as rookie, predominantly on special teams,[20] averaging 18.1 yards on seven kickoff returns.

[26] He played on special teams in all 16 games during the season,[20] totaling six tackles and eight kickoff returns for an average of 16.9 yards.

[27] Atkinson made his regular-season debut at running back in the season finale against the Pittsburgh Steelers.

[38] At one point, he was involuntarily committed to a psychiatric hospital after trying to harm himself due to the pain of Josh's death.

[4] George was one of at least 345 NFL players to be diagnosed after death with chronic traumatic encephalopathy (CTE), which is caused by repeated hits to the head.