sentences:  In 1952 he transferred to Second Division Lincoln City where he had ten first team appearances.Killin began playing for non-league Peterborough United in 1954 and made 101 first team games.His playing career was cut short due to an injury in 1958 when the doctor told Killin that continued treatment could cause permanent damage to his right knee and therefore suggested a complete rest from playing for an extended period of time.