Flatwater canoeist Reiner Hennes was a member of the West German K-4 1,000 metres at the 1972 München Olympics, which finished fifth in the final. He won two silver medals at World Championships: in 1970 with the K-4 10,000 (with Jochen Schneider, Erich Kemnitz, and non-Olympian Theo Geesmann), and in 1971 with the K-4 1,000 (with Erich Pasch, Eberhard Fischer, and Rudolf Blaß ). He earned two silver medals at the West German nationals in 1971 and 1972 in the K-1 10,000; and another silver medal in the K-1 1,000 in 1972. He also claimed several podiums in K-2 and K-4 events.