However, Dennis lost the starting spot for the 2004 season, having been suspended from the first two games due to a resulting criminal investigation (that later cleared him of any wrongdoing) and violating team rules.

[4] Dennis did appear in a total of 9 games in the 2004 season, but was beset by a serious, season-ending torn knee ligament in practices before the 2005 Orange Bowl.

During this period, Dennis considered transferring to another program, but his mother pressured him to stay and graduate as he is the only one of Teofilo's children to have attended a university.

Unfortunately, in spring practice Dennis was again beset by season-ending knee injury, causing him to entirely miss a second year in a row.

In addition to conference accolades, Dennis also made central contributions to teams that finished in the BCS top 5 during 6 consecutive seasons (2002–07).

Dennis signed to play with the Sioux Falls Storm as a running back in the Indoor Football League (IFL) during the 2011 season.