From Dragon Ball Encyclopedia, the ''Dragon Ball'' wiki
Strong (FUNimation "Strong") is a member of Freeza's Force.
Strong has dark skin.
Dragon Ball Z
Strong was one of the soldiers who Commander Ginyu forced to be a practice replacement in order for him to try out a new pose. He stood in the place of Butta. Unfortunately, he messed up the pose and was knocked into the sky by an angered Ginyu.
In the FUNimation dub and Ocean Group dub, the reason that Ginyu knocked Strong into the sky was changed into him being the same rank (captain) as Ginyu. As Ginyu knocked him away, he yelled, "There's only one Captain on the Ginyu Force, and that's me!".
Strong is of the same race as Raspberry.