Hall of Famer Dick Butkus wore #51.
Currently, no one wears number 51. I believe that number is retired. Dick Butkis used to wear that jersey.
The most famous player to ever wear number 51 for the Chicago Bears is former player, the Hall of Fame linebacker, Dick Butkus. After Butkus retired in 1973, six other players wore number 51 for the Bears until it was retired in 1994. These players are (and the years they wore number 51) are: Mel Rogers (1977), Doug Becker (1978), Bruce Herron (1978-82), Kelvin Atkins (1983), Mark Rodenhauser (1987) and Jim Morrissey (1985-1993).
He wore No.4 on his jersey.
No, it is not possible to wear the number 0 on a football jersey. However, the 0 jersey was issued in the NFL before the number standardization in 1973.
Jersey # 17