According to a report, Nate Diaz couldn't wait until UFC 202 to get into a fight. The man that defeated Conor McGregor was in attendance at UFC 199 and a statement from Evan Rodner, who produces Brendan Schaub's The Fighter and the Kid podcast, says that Diaz got into it with Jason Guida (via MMA Mad):
"It looked like Nate Diaz got into an altercation with Jason Guida, Clay Guida's older brother. I have no idea what it was over, but all of a sudden there were a ton of bodies entering the tunnels in the back.