NFL100: When the referee had to rule on things other than football
Valley Football: Zebras Ring Valley's Bell –
Zebra sidelines football player
NFL100: The expansion of officiating crews followed the evolution
NFL100: When the referee had to rule on things other than football
Gameday Observations: Maryland
NFL 100: Sports Illustrated's history of league, pro football
NFL at 100: The evolution of uniforms, from bees to Color Rush
NFL 100: Sports Illustrated's history of league, pro football
Officiating in the rain is mind over matter – Football Zebras