Longest Home Runs: Pre-Statcast Era
1: Babe Ruth, New York Yankees - 575 feet (1921)*
2: Mickey Mantle, New York Yankees - 565 feet (1953)*
3: Reggie Jackson, Oakland Athletics - 539 feet (1971)
4 (tie): Adam Dunn, Cincinnati Reds - 535 feet (2004)
4 (tie): Willie Stargell, Pittsburgh Pirates - 535 feet (1978)
6: Dave Kingman, New York Mets - 530 feet (1976)
7: Darryl Strawberry, New York Mets - 525 feet (1988)
8: Jim Thome, Cleveland Indians - 511 feet (1999)
9: Mo Vaughn, New York Mets - 505 feet (2002)
10 (tie): Joe Borchard, Chicago White Sox - 504 feet (2004)
10 (tie): Adam Dunn, Arizona Diamondbacks - 504 feet (2008)
No Frank Howard?
*distance after ball rolled for a while and maybe carried by a local stray animal