Rolf Axel "Acke" Ejnar Grönberg (9 May 1918 – 23 April 1988) was a Swedish Greco-Roman wrestler, who won the Greco-Roman middleweight division at the 1948 and 1952 Summer Olympics.

[1] 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.

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.