popularity of the sport, through franchise expansion, the eventual merger with the AFL, and popularity on television, is commonly credited to this game, making it a turning point in the history of football. NFL Commissioner Pete Rozelle was said by Giants owner Wellington Mara to have attributed professional football's surge in popularity to the game, because it "happened just at that time, in that season, and it happened in New York". Two-minute drill The drive by Baltimore at the end of regulation, with Unitas leading the team quickly down the field to set up the game-tying field goal, is often cited as the first instance of a "two-minute drill", for which Unitas became famous. Overtime games The game is, to date, one of only two NFL championship games—the other being Super Bowl LI—ever decided in overtime (the 1962 AFL Championship Game also went into overtime and eventually double overtime). In Super Bowl LI the New England Patriots beat the Atlanta Falcons, 34–28, just 3:58 into the overtime period. As Unitas later stated, the players had never heard of overtime before the game. "When the game ended in a tie, we were standing on the sidelines waiting to see what came next. All of a sudden, the officials came over and said, 'Send the captain out. We're going to flip a coin to see who will receive.' That was the first we heard of the overtime period." An NFL preseason exhibition game played three years earlier in Portland, Oregon, had been settled by a sudden-death overtime, but this was the first time an NFL game of any significance needed overtime to determine a winner. Bert Bell, the commissioner of the NFL, had just implemented the sudden-death overtime rule for this game. 50th anniversary Writer Mark Bowden, at the urging of his editor Morgan Entrekin, set out to write a book about the game in 2006, looking ahead to the 50th anniversary. Bowden credited Sports Illustrated writer Tex Maule with the "best game ever" phrase which he chose for his book title. Eagles' coach Andy Reid helped him analyze the film footage he was able to secure. Bowden said that while many who played in the game whom he interviewed (particularly Giants) maybe quibbled with the "best" characterization, they, "to a man, remark[ed] on how radically the popularity of the game jumped after that season." Bowden dedicated his book to David Halberstam.