Out of football during 1966, Trimble remained in Hudson, Quebec, a suburb of Montreal. Here, he and a Montreal friend began to market a new type of goal post that was supported by only one post, instead of the two aka the "H" that had been the standard since the game began. The so-called "slingshot" goalposts, named because of their "Y" shape, were adopted by CFL in 1966 and by the NFL in 1967, just after Trimble returned to coaching as an offensive line assistant with the New York Giants. Trimble had been offered the job by head coach Allie Sherman while attempting to sell the team his innovative goal posts.