| Pug Rentner | |
| Birth Date: | September 18, 1910 |
| Birth Place: | Joliet, Illinois, U.S. |
| Death Place: | Glencoe, Illinois, U.S. |
| Number: | 31, 7 |
| Position1: | Halfback, quarterback |
| Height Ft: | 6 |
| Height In: | 1 |
| Weight Lb: | 187 |
| College: | Northwestern |
| Playing Years1: | 1934–1936 |
| Playing Team1: | Boston Redskins |
| Playing Years2: | 1937 |
| Playing Team2: | Chicago Bears |
| Career Highlights: |
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| Nfl-New: | pugrentner/2523976 |
| Databasefootball-Archive: | https://web.archive.org/web/20151102120640/http://www.databasefootball.com/players/playerpage.htm?ilkid=RENTNPUG01 |
| Collegehof: | 1507 |
Ernest John "Pug" Rentner (September 18, 1910 – August 24, 1978) was an American football halfback and quarterback who played professionally in the National Football League (NFL) for the Boston Redskins and the Chicago Bears. He was inducted into the College Football Hall of Fame in 1979.
Rentner attended the Farragut School in Joliet, Illinois.
Rentner played college football at Northwestern University and was chosen to the 1931 College Football All-America Team. He was selected as Northwestern's Most Valuable Player in 1932.