Mike Gaddis, one of the greatest football players in the University of Oklahoma program's history, has passed away at the age of 50.


Former Sooners coach Barry Switzer informed reporters about Gaddis' death on Monday. The former Dallas Cowboys head coach was Gaddis' head coach at Oklahoma in 1988.


No official cause of death has been announced.


Gaddis was a star running back for the Sooners from 1988-91, missing the 1990 season with a knee injury. In 423 career rushing attempts, Gaddis ran for 2,622 yards and 27 touchdowns.


Indicating what type of talent he truly was, Gaddis recorded career highs in yards (1,240) and touchdowns (14) in '91, the year after his brutal injury.


Gaddis was drafted by the Minnesota Vikings in the sixth round of the 1992 draft, but did not make the team after suffering another knee injury.


In his adult life, Gaddis suffered from a kidney disease and underwent a kidney transplant in 2005. He also owned a Farmers Insurance agency in the Oklahoma City metro.