Manager Frederick Joseph Crolius (December 16, 1876 – August 25, 1960) was an American football and baseball player and coach.

Crolius served as the team's fourth outfielder, playing mostly right field, where he backed up Jimmy Slagle.

In his second year in the majors, Crolius played for the Pittsburgh Pirates for nine games in 1902, before ending his baseball career.

He was considered one of the best halfbacks in the game, but received little notice from the media, since Dartmouth was historically seen as having a weak football program.

[3] In 1901 as a member of the Homestead Library & Athletic Club, located near Pittsburgh, Crolius served as the team's halfback.