He accepted a football scholarship from the University of Louisiana at Monroe, where he was a three-year starter at cornerback. As a freshman, he registered 65 tackles (3 for loss), 3 interceptions, 8 passes defensed and one sack.
The next year, he led the nation with 7 interceptions (school record), while tallying 18 passes defensed (school record), 75 tackles and 2 interceptions returned for touchdowns. As a junior, he made 40 tackles, 3 interceptions (tied for the team lead) and 10 passes defensed (led the team).
He declared for the NFL draft after his junior season, finishing his college career with 180 tackles, 13 interceptions (tied for third all-time) and 36 passes defensed (school record).
Professional career
Kansas City Chiefs
Dennis was selected by the Kansas City Chiefs in the fifth round (162nd overall) of the 2000 NFL draft.[1] As a rookie, he started the final 13 games at left cornerback in place of an injured James Hasty, while registering 70 tackles, 7 passes defensed, 2 fumble recoveries, one forced fumble, one interception and 10 special teams tackles.
In 2001, he suffered a sprained medial collateral ligament in his right knee during the third pre-season game against the Jacksonville Jaguars. On September 2, he was placed on the injured reserve list. He was waived injured on October 2.
Dallas Cowboys
On October 3, 2001, Dennis was claimed off waivers by the Dallas Cowboys. He appeared in 11 games in the team's nickel defense after recovering from his right knee injury, posting 14 tackles, 8 passes defensed and 8 special teams tackles.[2] He was released on September 1, 2002.[3]
Houston Texans
On September 2, 2002, he was claimed off waivers by the Houston Texans, becoming a part of the franchise inaugural season. He suffered a torn ACL in the sixth game of the year against the Cleveland Browns. On October 22, he was placed on the injured reserve list, finishing with 5 special teams tackles and one defensive tackle.[4]
On June 18, 2003, he had to undergo a second knee surgery on the same knee he tore the ACL. On August 26, he was placed on the injured reserve list. He was released April 27, 2004.[5]