[2] The member of the German 1958 FIFA World Cup squad won 23 caps and scored two goals.
During the 1958 FIFA World Cup, Stollenwerk was chosen to replace Fritz Herkenrath in the goal in case he got injured (with no substitutions being allowed).
FC Köln coach Hennes Weisweiler converted Stollenwerk to right back.
This proved to be a good career move for him, as he felt at home in that role immediately and played convincingly enough to be called up again for international duty by Sepp Herberger.
Stollenwerk played in every German game at the 1958 FIFA World Cup and won 23 caps in total.