The "Slingshot," Goal Post was soon adopted by the NFL & the CFL during his time promoting the new design. It revolutionized the game, making it not only easier for kickers to identify the uprights but erased the injuries of the past whereby receivers, running backs, and defensive players would hit or run into one of the two poles used to support the cross bar in the traditional "H" design. Schools & universities followed. (The threat of injury was diminished even further, when the NFL moved the goalpost to the back of the end zone in 1974.)