Career
Grau was seriously injured, along with teammates Albert Brehme and Helmut Hopnaann, shortly before the 1932 Winter Olympics. He also finished sixth in the two-man event at the 1936 Winter Olympics in Garmisch-Partenkirchen.
Grau was seriously injured, along with teammates Albert Brehme and Helmut Hopnaann, shortly before the 1932 Winter Olympics. He also finished sixth in the two-man event at the 1936 Winter Olympics in Garmisch-Partenkirchen.
