That claim (admittedly likely to be somewhat exaggerated due to those who didn't take the invitation and variance within the tournament) is based on my finishing in the semi-finals (so tied for third, actually, no third-place match) in an invitational "tournament of champions" in 1997.
I don't think the results are posted anywhere, as the internet wasn't such a big thing back then, and even then they usually only post the finals. BTW, this is not in MMA, as some people might get the impression based on the follow up post someone else made. I compete in a single style.
/derail
The point is that you don't have to be a "rip your heart out" guy to be a great competitor. I want to win, but I want to win with class and still be friends afterword. That doesn't make me less of a competitor, imo. The guys who do use rage as a motivator usually have a hard time reacting in the flow of the moment, because the only direction they know how to go is forward, so I can sidestep them like a bullfighter and win with elegance.