Johnny Olszewski

John Peter Olszewski (December 21, 1929 – December 8, 1996) was an American football fullback. He was drafted in the first round (fourth overall) of the 1953 NFL Draft and played professionally for the Chicago Cardinals, Washington Redskins and Detroit Lions. Olszewski was selected to play in the Pro Bowl after the 1953 and 1955 seasons. Known as Johnny O, he was among the first NFL players to wear the jersey number zero. He concluded his career in the American Football League (AFL) with the Denver Broncos in 1962. 
Olszewski was an All-America at the University of California, Berkeley, where he starred in the backfield for three seasons. Through the 2020 season, he still was the No. 10 ground-gainer (2,504 yards) in school history. He was inducted into the California Athletics Hall of Fame in 1993. 