Humm was selected by the
Oakland Raiders in the
fifth round of the
1975 NFL draft with the 128th overall pick, partly because he was ambidextrous. The next year, he was a part of the
Super Bowl XI championship team. He was the backup to
Ken Stabler for five seasons and was also an effective holder for
field goals or
extra points. Humm had an unusual habit of going on to the field with no shoulder pads, which sometimes tipped the opposing team that a fake field goal was unlikely. In
1981, Humm signed as a
free agent with the
Baltimore Colts. That year, the game between the Colts and the
Dallas Cowboys was the only start in his
NFL career when injuries sidelined
Bert Jones and
Greg Landry. He completed seven of 24 passes for 90 yards and two interceptions, in a 37–13 loss, the thirteenth consecutive for the Colts. Notably, the opposing quarterback for the Cowboys,
Glenn Carano, was also making his first and only NFL start in place of
Danny White. This is the only time in league history two "one and done" quarterbacks have ever faced off. Carano and Humm were the subjects of an
NFL Films piece entitled
My One and Only, recounting the 1981 game. The two quarterbacks had been friends since high school (both played high school football in Nevada), and remained friends until Humm's death. In
1983, he was signed as a
free agent by the
Los Angeles Raiders. That season, he was a part of the
Super Bowl XVIII championship team, serving as the third-string quarterback behind
Jim Plunkett and
Marc Wilson. Humm was the only Raiders player to be a member of both the Raiders' 1976
Super Bowl XI and 1983
Super Bowl XVIII championship teams, without also being a member of the 1980
Super Bowl XV championship team. Humm's last NFL action came in a Week 10 contest in 1984 against the
Chicago Bears, a game considered one of the most violent in NFL history. ==Personal life==