Career
He played college football at Franklin College. He first enrolled at Hillsboro High School in Hillsboro, Illinois before transferring to Marion High School in Marion, Indiana. Isselhardt played for the Franklin Grizzlies.
He was inducted into the Franklin College Athletic Hall of Fame in 1975.
Detroit Lions
Isselhardt played in one game for the Detroit Lions in 1937. Cleveland Rams
Isselhardt played in eight games for the Cleveland Rams during the 1937 season.
