A clip of the incident, captured by TMZ, shows Ariel Ramirez punching Fieri through the open window of an SUV as he cries and curses at the chef.
Although the video does not capture the beginning or the end of the brawl, sources claim Guy threw Ramirez out of the car over a silly argument.
"It was just dudes being dudes," a source said.
In the end, Guy's manager reportedly got out of the car and took Ramirez home by cab.
"A bunch of guys were messing around," a rep for Fieri explained. "Things got a little out of hand, but they're all good now."