After playing college football for the Auburn Tigers as a three-time All-Southeastern Conference (SEC) selection (1986–1988), Rocker moved on to the Washington Redskins in the NFL for two seasons (1989–90).

[1] Despite robust success in college, Rocker wasn't selected until the third round of the 1989 NFL draft by the Washington Redskins because of questionable work habits and concern over a knee injury as well as possible arthritis.

Better things were expected of Rocker one year later, but frequent mental lapses, the lack of a pass rush and failure to pursue plays away from his position became a concern among the team coaches.

He was benched in favor of recently acquired Eric Williams, as defensive coordinator Richie Petitbon cited the need to “get our best athletes on the field."

When no other NFL organization expressed interest in his services, he concluded his playing career with a one-year stint with the Orlando Thunder in the World League of American Football.

Rocker joined Houston Nutt's staff at Arkansas after one year at Cincinnati where he helped the Bearcats win a share of the 2002 Conference USA (C-USA) title.

His 2006 line ranked fourth in the SEC and thirty-third in the nation in rushing defense, holding opponents to 114.57 yards per game.

In January 2009, Rocker left Ole Miss to coach the defensive line at his alma mater, Auburn University.

After a week at Auburn, in 2021, Rocker returned to the NFL to serve as the defensive line coach for the Philadelphia Eagles.

Under Rocker's guidance, Jamaal Anderson was the premier pass rusher in the SEC in 2006 with 14 sacks for 100 yards and 20.5 tackles for loss.