He played college football for the Pittsburgh Panthers and was selected by the Atlanta Falcons in the fifth round of the 2019 NFL draft.

[6] In the Week 11 matchup against the Carolina Panthers, Ollison scored from two yards out on his first career rushing attempt during the second quarter of the 29–3 win.

[12] During the Week 18 matchup against the New Orleans Saints, he scored his fifth career touchdown on a 19-yard rushing attempt in the 30–20 loss.

[16] The signing reunited him with defensive coordinator Dan Quinn, who was his head coach with the Falcons.

[20] On January 14, 2025, Ollison signed with the BC Lions of the Canadian Football League (CFL).