He served as the head coach of the CFL's Ottawa Renegades in 2006, the FXFL's Blacktips in 2014 and the Hudson Valley Fort for part of 2015.
During his career as a coach, Jenkins has mentored a number of notable quarterbacks such as Andre Ware, David Klingler, Jim Kelly, Eric Crouch, Kliff Kingsbury, Anthony Calvillo and Doug Flutie.
In Jenkins' debut as offensive coordinator against Steve Young and the Los Angeles Express, the Gamblers trailed 33–13 with eight minutes left in the fourth quarter.
In the fourth week of the 1985 season, the Gamblers met Davis' Denver Gold in the first game ever to pit two run and shoot offenses.
The two offenses showed only small similarities as Jenkins employed various new tactics such as motioning receivers out of the backfield and going into empty sets.
However, Kelly and his backup, Todd Dillon, combined 6,118 yards passing on the season, a record for professional American football.
The Gamblers offense also featured three receivers—Clarence Verdin, Gerald McNeil, and Richard Johnson—that each totaled over 1,000 yards, a rarity that only Don Coryell's San Diego Chargers accomplished in the early 1980s.
[2] Jenkins' new offense made an immediate impact in the Southwest Conference as Houston beat the Texas Longhorns handily in each of his first three seasons: 60–40 in 1987, 66–15 in 1988, and 47–9 in 1989.
He completed the season with 5,140 yards and 54 touchdowns, outpacing Ware's totals from 1989, but fell short in the Heisman race, finishing fifth behind winner Ty Detmer and three others.
The Cougars were not allowed to go to a bowl game due to NCAA sanctions for violations under former coach Bill Yeoman.
After leaving Houston, Jenkins landed a job as a defensive backs coach with the Winnipeg Blue Bombers of the Canadian Football League (CFL).