 Offensive lineman Bob Kalsu quit the team after his 1968 rookie season to serve in the Vietnam War.He never returned; Kalsu was killed in action in 1970 and is often cited by Bills fans as the first professional football player to die in action in war during his playing career.This is not true, as Young Bussey and Jack Lummus were still of playing age when they left the NFL to serve in World War II and were killed in action a few years later.