Claim: Roman Jakóbczak, a Polish football midfielder who participated in the 1974 FIFA World Cup (held in West Germany from 13 June to 7 July), became a football manager after his football career.
Evidence: Roman Jozef Jakóbczak (born 26 February 1946) was a Polish football midfielder who participated at the FIFA World Cup 1974. The 1974 FIFA World Cup was the 10th FIFA World Cup, and was played in West Germany (including West Berlin) between 13 June and 7 July. After his football career, he became a football manager.