Jason is the one who was in the bar fight, but it's confusing many don't realize those two are not the same person.
The local Scottsdale/Phx papers I've read don't mention anything about Jason and anyone's girlfriend. Rather that he sneezed on some guy and didn't apologize and they ended up in a scuffle and the cops were called. Jason was then belligerant with the cops.
Allegedly of course at this point. Who knows, it was probably both the girl deal and the sneeze not going over well with too much alcohol all around.