After entering the fourth trailing 11-8, the Big Red (6-1, 2-0) evened the game four minutes in and took the lead for good when Steve Mock scored with 8:10 to play.
Denver used a 6-2 run in the second quarter to take the lead before halftime.
No. 9 Lehigh 12, Holy Cross 3: The host Mountain Hawks (9-1, 2-0 Patriot League) took a 4-0 lead in the first quarter to beat the Crusaders (4-5, 0-3) for their school-record eighth straight win. Lehigh has the most wins in the nation.
In the second quarter, Duke went on a 5-0 run to lead 8-3 at halftime.
No. 15 Princeton 10, Yale 9, 5OT: Alex Capretta ended the longest game in both schools' history with a goal 2:21 in the fifth overtime, giving the Tigers (5-2, 2-0 Ivy) a win over the Bulldogs (2-4, 0-2).
Capretta scored two goals and added an assist in the fourth quarter as Princeton built two three-goal leads, including 9-6 with 3:35 to go.
Yale got the equalizer from Greg Mahony with 21 seconds to go.
Princeton spent its final timeout in the fifth overtime and off the restart, Tucker Shanley faked left and passed it back to Capretta for the final score.
No. 3 North Carolina 9, No. 20 Boston College 8: Abbey Friend's free-position goal with 7:45 to play broke an 8-all tie and lifted the visiting Tar Heels (10-1, 2-0 Atlantic Coast Conference) over the Eagles (5-5, 1-2).
No. 4 Florida 10, No. 15 Ohio State 8: Freshmen Nora Barry and Shannon Gilroy combined for seven points to help lead the visiting Gators (10-2, 1-0 American Lacrosse Conference) past the Buckeyes (7-2, 0-1).
No. 6 Notre Dame 13, Louisville 11: The visiting Cardinals (2-6, 0-1 Big East) took a 5-1 lead with 17:34 left to play in the first half, but the Irish (7-0, 1-0) went on a 9-0 run and held Louisville scoreless for 23:09 to retake the lead. No. 16 Virginia 14, No. 7 Duke 12: The Blue Devils (8-4, 2-1 ACC) lost an 8-5 halftime lead as the visiting Cavaliers (6-4, 1-2) outscored Duke with nine goals in the second half.
No. 8 Dartmouth 15, Columbia 4: After the visiting Lions (1-6, 0-4 Ivy) scored the opening goal just over a minute into the contest, the Big Green (6-1, 2-0) had 15 straight goals over the next 37 minutes.
No. 9 Penn 11, No. 18 Cornell 10: The visiting Quakers (5-2, 3-0 Ivy) scored nine of the game's final 15 goals to push past the Big Red (6-2, 2-1) despite trailing 5-2 with 10:36 left in the first half.