Rivers did not hold an offer from Georgia until the middle of January, just days after Jeremy Pruitt took over the defensive coordinator job.
Once that offer arrived, UGA moved up Rivers' list.
He stayed in contact with Pruitt, then took a visit to Georgia this weekend. It was there that he flipped to the Dawgs.
"I am a Dawg," Rivers said via text message Saturday afternoon.
He is a 6-foot-3, 240 pound defensive end out of Stone Mountain (Ga.) Stephenson.
Scout ranks Rivers as the No. 25 end in the country.
Stay tuned for more on this breaking news.