Tiki Barber says he would still be playing football if the Giants had a new head coach. The recently retired star running back has used his new memoir to rip Big Blue boss Tom Coughlin, blaming his former head coach for driving him from the game he loved. "If Tom Coughlin had not remained as head coach of the Giants, I might still be in a Giants uniform," Barber wrote in his upcoming book "Tiki: My Life in the Game and Beyond," excerpts of which were obtained by the Daily News.