Complex sentence: He played college football as a halfback for the University of Michigan from 1954 to 1956 and professional football as a halfback, defensive back and flanker for nine seasons in the National Football League (NFL) for the Detroit Lions from 1957 to 1965.
Split into simpler sentences: He played college football as a halfback for the University of Michigan from 1954 to 1956. Barr later played professional football as a halfback, defensive back and flanker for nine seasons in the National Football League (NFL) for the Detroit Lions from 1957 to 1965.