He wasnt in the second xxx iirr

Both correct.

I could have sworn there were 3 XXX movies and Vin Diesel was in 2 of them. Upon checking imbd, I'm very mistaken. Maybe the first one was just so tedious that I thought there were two?

Jason Lee - The Chipmunks movies & the Kevin Smith series of related films, not sure if they count though

I thought about this too, but he plays Brodie in Mallrats, Banky in Chasing Amy and both characters in Jay and Silent Bob Strike Back.