By Joseph Salvador He says Brady was “the greatest champion” but says Manning was the greatest signal-caller he ever saw. View the original article to see embedded media. During an appearance on The Adam Schefter Podcast, recently-retired quarterback Ryan Fitzpatrick discussed who he thought was the best signal-caller in NFL history. His choice might be a surprising one. “I think Peyton [Manning] is the greatest quarterback to ever live,” Fitzpatrick said. Fitzpatrick said Manning changed the game from the mental side of things and his ability to control a game made him “the most impressive” q…