Well, I can't corroborate that as I never saw them live, but I can vouch for the fact that he's the only trumpeter I've ever seen do a backflip in the middle of a solo (from a stationary stance no less!) and keep on playing. My jaw dropped on my chest when I saw him do this at a Krewe concert. The man's got the moves, that's for sure. The blend of showmanship and creative musicality does Pops proud.
Just happened to see the music video for Kool and the Gang 'Celebration' quite recently and there's a trumpeter at the back who looks a lot like Michael Ray doing this trick with the trumpet (spinning it like a baton). Must be him, I guess. The video was from about 1978.
Backflips too? Wow !