|Born||9 May 1918|
|Died||23 April 1988 (aged 69)|
|Club||BK Athén, Stockholm|
Grönberg was raised in Norberg, but moved to Stockholm as a teenager. There he worked as a plumber and masseur, and started wrestling following his elder brothers Fritz and Harald. Besides his Olympic medals he won a world title in 1950, three European Championship medals, as well as 16 national titles between 1944 and 1958.
|This article about a Swedish Olympic medalist is a stub. You can help Wikipedia by expanding it.|
|This biographical article relating to a Swedish sport wrestler or wrestling coach is a stub. You can help Wikipedia by expanding it.|