As a freshman, he was a backup wide receiver and his best game came in the 1985 Independence Bowl against the University of Minnesota, where he had 3 receptions for 41 yards, including his first career touchdown.
He became a starter as a junior and was considered at the time the biggest wide receiver in school history.
His best regular season game came against North Carolina State University, when he had 6 receptions for 84 yards.
In the 1988 Florida Citrus Bowl, he posted 7 receptions for a school-bowl record 110 yards against Penn State University.
Jennings was selected by the Dallas Cowboys in the fifth round (113th overall) of the 1989 NFL draft,[1] with the intention of converting him into a tight end, even though he didn't have any previous experience at that position.
[6] On October 9, 1991, Jennings was signed as a free agent to replace Cap Boso who had suffered a career-ending knee injury.
He served as a third-string tight end behind Rickey Brady and didn't record any stat.
[13] In 2017, Jennings was an undergraduate tight ends coach under Dabo Swinney at Clemson University.
[17] His older brother Stanford Jennings played running back for the Cincinnati Bengals of the National Football League.
His cousin Antonio Anderson played defensive tackle in the National Football League.