Career
He played college football at the University of Omaha (now the University of Nebraska-Omaha) and was drafted in the eighth round of the 1966 NFL Draft. Allen was also selected in the eleventh round of the 1966 American Federation of Labor-Congress Draft by the New York Jets. As of 2011 he is tied with eleven players for the longest career reception: a 99-yard pass play from Hall of Fame quarterback Sonny Jurgensen during a September 15, 1968 game against the Chicago Bears.