Jim Zyntell of the Philadelphia Eagles is an example of a fast footed guard, quick to pull out of the line to head the interference. Guards in modern football must be as fast on their feet as backfield players and just as clever interferers, since almost every "system” requires the guard to pull out of the line with the snap of the ball. But be careful not to tip off your intenttion or the direction of the play before the ball is snapped, lest keen eyes in the opposing defense detect your "leaning" and foresee the spot where your play is to go. James T. Zyntell, Holy Cross. 24 years old, 6 ft. 1 inch, 200 pounds. All Eastern Team 1931-1932. Home Dorchester, Mass.