Kevin Smith shares his return with his perpetual partner in crime Jason Mewes, who plays Jay, and Jason Lee.
The Jay and Silent Bob “cinematic universe” is a somewhat confusing place, as all the films Smith made between Clerks and Jay and Silent Bob Strike Back take place within the same continuity, but Smith tended to use an ensemble cast, so the same actors tend to play multiple roles within that universe.
According to Smith here, Lee is portraying his Mallrats character Brodie Bruce in the scene they shot on the first day, not to be confused with Banky Edwards, Lee’s character from another Kevin Smith film, Chasing Amy.