| Birth Date: | 27 January 1922 |
| Birth Place: | Johnstown, Pennsylvania, United States |
| Death Place: | Rockville, Maryland, United States |
| College: | Western Reserve |
| Number: | 57, 68 |
| Position: | Guard |
| Honors: | Cambria County Sports Hall of Fame |
| Playing Years1: | 1943 |
| Playing Team1: | Great Lakes Navy |
| Playing Years2: | 1944 |
| Playing Team2: | Bainbridge Navy |
| Playing Years3: | 1945 |
| Playing Team3: | Fleet City Bluejackets |
| Playing Years4: | 1946–1948 |
| Playing Team4: | Boston Yanks |
| Playing Years5: | 1948 |
| Playing Team5: | Chicago Cardinals |
| Playing Years6: | 1949–1952 |
| Playing Team6: | Washington Redskins |
| Playing Years7: | 1953 |
| Playing Team7: | Chicago Bears |
| Databasefootball: | BADACJOH01 |
| Pfr: | BadaJo20 |
| Nfl: | BAD166116 |
John Walter "Baddie" Badaczewski (January 27, 1922 - December 12, 1999) was an American football offensive lineman in the National Football League for the Boston Yanks, Chicago Cardinals, Washington Redskins, and the Chicago Bears. He played college football at Western Reserve University (now known as Case Western Reserve University).[1] He sacked opposing quarterbacks 22 times in the year 1946 alone.