The very first professional football player. Magazine cover, from Heffelfinger’s Football Facts, 4 x 6.5, signed on the reverse in fountain pen, “With my best wishes, W. Heffelfinger, Yale, 1891.S.” In fine condition, with trimmed lower right corner, a couple small tape repairs and a couple collector’s notations, none affecting signature. COA Steve Grad/PSA/DNA and R&R COA.