"I can't imagine that there has ever been a better book on offensive line play. It is the ultimate teaching tool for any level of play--from the pro level to youth football. Great book " --Tom Flores, five-time Super Bowl champion The most important unit on any football team, from Pop Warner to the pros, is the offensive line. In Playing the Offensive Line , former New York Giant and Super Bowl champion Karl Nelson and veteran coach Bob O'Connor team...