Harvard scored late in the third period to force overtime and went on to beat the Gophers 4-3 to claim the title in the 25th annual Mariucci Classic on Saturday night.
Steve Johnson's first career goal put the Gophers up 3-2 with 5:31 to play in the game, but Harvard tied the game with its goalie pulled with just 34 seconds left in the third.
Kyle Criscuolo had both the game-tying and game-winning goals for the Crimson.
Harvard defeated Ferris State 7-3 on Friday while the Gophers topped Connecticut 3-2 on Friday.
Other scores Saturday:
#5 St. Cloud State 7, Arizona State 0
#2 North Dakota 4, Alabama-Huntsville 1
Minnesota-Duluth 4, U.S. Under-18 Team 3