The Final Four teams have been decided in the U.S. men's college basketball national championship tournament, and none of the four regional top seeds are among them.

Unheralded George Mason University of northern Virginia upset top seeded Connecticut, 86-84, in overtime Sunday. Jai Lewis had 20 points while four other George Mason teammates were also in double figures. Rudy Gay was the top scorer for UConn with 20.

Seeded 11th in the tournament, George Mason joins the 1986 LSU (Louisiana State University) team as the lowest-seeded squads to reach the Final Four since the tournament field expanded from 48 to 64 teams in 1985.

George Mason will face Florida in the semifinals on Saturday in Indianapolis, Indiana. Florida eliminated top seeded Villanova, 75-62. Joakim Noah led Florida with 21 points while Villanova's Randy Foye had a game high 25 points.

The other top seeds, Duke and Memphis, had been eliminated earlier in the tournament. LSU and UCLA (University of California at Los Angeles) will face each other Saturday in the other semifinal. The winners advance to the national championship game on April 3.

The last time the Final Four featured no top seeds was in 1980.

Some information for this report was provided by AP.