While Ryan (B.J. Novak) went from being a major character to a total joke in the later seasons of The Office, that's not why Novak left the show in Season 9.

If you did the hokey pokey in the Museum of Fine Arts in 1997, blame BJ Novak. But also, it’s time to forgive him. Try not to sing “Ryan started the fire” as you read this, but BJ messed ...