St. Lawrence, which was humbled 4-3 by Renssellaer Saturday, is in second with 27 points. Colgate dropped to 11-14-1 overall, 8-10-0 ECAC to keep it in eighth place.
Harvard began the game the way it did the night before: sluggish and tentative. But as the game progressed, the Crimson picked up its pace.
By period's end, Harvard picked up two goals after pelting Colgate goalie Shawn Murray with 13 shots.
At 18:16 freshman forward Brad Konik fed sophomore Chris Baird on the right side. Racing in, Baird shot into the right corner, collected the rebound off Murray's pads and punched the puck into the net.
Only 49 seconds later, freshman forward Perry Cohagen (who played tremendously during the weekend) tipped in McCann rebound in front of the net to put the Crimson up 2-0.
Colgate responded quickly in the second period when junior forward Craig deBlois broke in free on the right side and flicked the puck past Hughes.