He has also been a member of the Green Bay Packers and Las Vegas Raiders of the National Football League (NFL), and the Montreal Alouettes of the CFL.

[3] On September 22, 2015, Stanback was dismissed from UCF after reportedly failing multiple marijuana tests.

[19] In 2022, Stanback suffered a broken ankle in the first game of the season and was placed on the six-game injured reserve list.

[20] He returned to practice on September 27, 2022, and played in the final four games remaining in the regular season.

He also played in both playoff games, including the East Final victory over the Toronto Argonauts, where the Alouettes qualified for their first Grey Cup appearance since 2010.

[22] In Stanback's first Grey Cup game, he had nine carries for 68 yards, including a 32-yard touchdown run in the first quarter, and won his first championship as the Alouettes defeated the Winnipeg Blue Bombers in the 110th Grey Cup game.

[22] As a pending free agent in the following off-season, Stanback was granted an early release on January 30, 2024.