He played college football for the Oklahoma Sooners, thrice earning All-American honors, including a unanimous selection in 1979.
He was an athletic director and head football coach for Bishop Thomas K. Gorman Catholic School in Tyler, Texas.
Ordained to preach several years ago in Houston, Cumby is currently the pastor of Noonday Methodist Church, 17320 state Hwy 155, Flint, Tx.
With a combination of speed and strength, he is considered one of the top defensive players of all time at Oklahoma.
Cumby was described by then-head coach Barry Switzer as "the only person I know who could go one-on-one with Earl Campbell and knock him backwards."
[7] Cumby was cut by the Packers the following preseason on August 18, 1986,[8] and subsequently signed by the Buffalo Bills.