|Born||30 April 1952|
|Died||15 August 1981(aged 29)|
|Club||Potsdamer RC Germania|
At the 1974 World Rowing Championships in Lucerne, he won bronze with the coxed four. At the 1975 World Rowing Championships in Nottingham, he won bronze with the coxed four. In 1976 he was a crew member of the West German boat that won the bronze medal in the coxed four event. He died of a lymphoma on 15 August 1981.
- "Rudern – Weltmeisterschaften. Vierer mit Steuermann – Herren" [Rowing – World Championships. Four with coxswain – Men]. Sport-Komplett.de (in German). Archived from the original on 13 January 2014. Retrieved 5 January 2018.
- Evans, Hilary; Gjerde, Arild; Heijmans, Jeroen; Mallon, Bill; et al. "Ralph Kubail". Olympics at Sports-Reference.com. Sports Reference LLC. Archived from the original on 18 April 2020. Retrieved 5 January 2018.
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