[3] After the war, Metzner played for Hessen Kassel as an inside forward and as a half back.

He was first called up by West German coach Sepp Herberger for a 1952 international friendly against Yugoslavia, where he did not play.

Although he was a member of the 1954 FIFA World Cup German squad, Metzner could not break into the starting eleven, neither as a half back nor as an inside forward, as the half backs Horst Eckel and Karl Mai and the inside forwards Max Morlock and Fritz Walter were too strong.

Metzner ended his career on 5 August 1961, in a friendly game between Kassel and Radnički Belgrade.

This biographical article related to association football in Germany, about a midfielder born in the 1920s, is a stub.