William Earl Potteiger
- Bats unknown, Throws unknown
- Height 5' 7", Weight 180 lb.
- School Ursinus College, Albright College
- High School Perkiomen Seminary
Outfielder Earl Potteiger spent eight seasons in the minor leagues, playing on-and-off from 1913 to 1932. From the records available, it appears his best season was 1914, when he hit .314 with 13 triples in 117 games between the Worcester Busters and Lowell Grays. In 1919, he hit .349 with 10 triples in 72 games for the Worcester Boosters. He also did some managing, skippering the Wilkes-Barre Barons for the latter part of 1926 (replacing George Maisel) and for all of 1927. In 1932, he led the Pottstown Legionaires until the league's disbandment on June 20.
He is perhaps more well-known for his time in professional football. He played in the NFL from 1922 to 1928, spending four years with the New York Giants - including 1925, their inaugural season. He was head coach of the 1927 Giants, who were the NFL Champions. Numerous persons with baseball experience were on that team, including Hinkey Haines, Cal Hubbard, Chuck Corgan, Joe Guyon and Jim Kendrick.