Hackett is the only known expert witness to the passing offenses of both Cochems' 1906 squads and that of Stagg, who dismissed any special role for the St. Louis coach in the development of the pass. Hackett was an official in games involving both teams. As Wray recalled almost 40 years later: "Hackett told this writer that in no other game that he handled had he seen the forward pass as used by St. Louis U. nor such bewildering variations of it."