Following his graduation from Ohio State in 1968, he remained with the Buckeyes for six seasons as an assistant coach under Woody Hayes.

Florida A&M remains the only Historically black college to have won the NCAA Division I-AA Football Championship.

Hubbard spent 12 seasons with the Rattlers, and posted an 83–48–3 (.631) overall record, the third most wins in school history behind fellow FAMU head coaches Jake Gaither (203) and Billy Joe (86).

During Hubbard's tenure, FAMU transitioned from the NCAA Division II's Southern Intercollegiate Athletic Conference (SIAC) to NCAA Division I-AA independent status, and then joined Mid-Eastern Athletic Conference (MEAC) in 1980.

The players under Hubbard who went on to play in the National Football League (NFL) were Frank Marion (linebacker), Ralph Hill (offensive lineman), Tony Samuels (tight end), Clarence Hawkins (running back), Greg Coleman (punter), Gene Atkins (defensive back), Tyrone McGriff (guard),[2] and Nate Newton (Pro Bowl offensive lineman).