After five years, he was traded to the Denver Broncos in March 1977[1] and started in Super Bowl XII.

[2] As a collegiate player at Washington State in the Pac-8, Jackson was a running back and kick returner for head coach Jim Sweeney[2][3][4][5][6] During his senior season in 1971, he rushed for 1,189 yards on 177 attempts (6.7 avg, 1st in Pac-8)[7] and was named First-team All-Pac-8 and All-Coast.

[8] His 2,118 all-purpose yards in 1971–1,189 on the ground, 744 in kickoff returns and 185 receiving—remains the all-time WSU single-season record.

Injured with a muscle bruise for much of the 1980 season, he was waived in late November and picked up by the San Diego Chargers.

[9] Jackson died of liver cancer at age 46 in Lompoc, California,[2][10][11][12] and is buried at its Evergreen Cemetery.