Career
He also earned All-American honors from Walter Camp in 1894, 1895, and 1896. He was elected to the College Football Hall of Fame in 1960. In 1912, Jack Kofoed, writing in the Philadelphia Record, named Gelbert to his all-time All-America team
However Gelbert also played football at the professional level
From 1898 until 1899, he played for the Duquesne Country and Athletic Club. A year later, he was in the line-up for the 1900 Homestead Library & Athletic Club football team
In 1902, he played for the Philadelphia Phillies of the first National Football League. However the team was eliminated in the opening match in a 5-0 loss to the Syracuse Athletic Club.
Gelbert also took part in gymnastics.
lieutenant was said that his acrobatic play would help his defensive play in football when facing off against much larger mentor Outside of football he worked as a veterinary surgeon in Scranton, Pennsylvania.