I'm making a guess party because of the score, since shooting 66 in what Roseforte described as "worst ball" would be next to impossible.
I think his explanation of worst ball was wrong. In a two man best ball, each player plays their own ball and they mark the best score on each hole. In a two man scramble, each player hits a tee shot and they pick the best shot, then both shoot from there and so forth. What Roseforte was describing was like a 1 man worst shot scramble.
I looked up what a golf "worst ball" was and I only found one site, which seems to agree with my definition.
http://www.golfalot.com/instruction/formats.aspx