| Bill Haeffner | |
| Bats: | Right |
| Throws: | Right |
| Birth Date: | 18 July 1894 |
| Birth Place: | Philadelphia, Pennsylvania, U.S. |
| Death Place: | Delaware County, Pennsylvania, U.S. |
| Debutleague: | MLB |
| Debutdate: | June 29 |
| Debutyear: | 1915 |
| Debutteam: | Philadelphia Athletics |
| Finalleague: | MLB |
| Finaldate: | May 5 |
| Finalyear: | 1928 |
| Finalteam: | New York Giants |
| Statleague: | MLB |
| Stat1label: | Batting average |
| Stat1value: | .194 |
| Stat2label: | Home runs |
| Stat2value: | 0 |
| Stat3label: | Runs batted in |
| Stat3value: | 14 |
| Teams: |
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William Bernard Haeffner (July 18, 1894 – January 27, 1982) was an American Major League Baseball catcher. He played for the Philadelphia Athletics during the season, the Pittsburgh Pirates during the season, and the New York Giants during the season. Haeffner served as the head baseball coach as La Salle University from 1947 to 1952.
He died on January 27, 1982, and is interred at Mount Peace Cemetery in Philadelphia, Pennsylvania.[1]