99 yards ... a play that goes from the offensive team's one yard line all the way for a touchdown.
Oregon State quarterback and Heisman Trophy winner Terry Baker has the longest TD, 99 yards in the 1963 Liberty Bowl against Villanova.
for a cowboy its was tony dorsett 99yd run for a td the longest rushing play possible in football is 99 yards...
Johnny Johnson
terry fox
Tom Dempsey and Jason Elam are tied for the longest with 63 yards.
Willie Parker (75 yards)
Ricky watters
The longest possible run from scrimmage in football is 99 yards. According to Pro-Football-Reference.com, Tony Dorsett had a 99-yard run for the Dallas Cowboys against Minnesota in 1982. The Vikings won the game anyway, 31-27. Ahman Green had a 98-yard run for Greenbay in 2003. Two others have 97-yard runs, and four others have 96-yard runs. ----------
Bill Osmanski.
Tony Dorsett. Dorsett had a 99 yard run from scrimmage against the Minnesota Vikings on January 3, 1983.
Joseph Adahai had a 26 yard run
Walter Payton's longest rush from scrimmage was 76 yards against the Denver Broncos on October 16, 1978.