By Arielle Aronson/DFP StaffIt took an extra five minutes of play, but the No. 4/6 Merrimack College Warriors remained undefeated Friday night after coming from behind to top the No. 16 Boston University men’s hockey team, 3-2, in overtime at Agganis Arena. Merrimack trailed by a 2-1 margin for much of the game, but a late power-play tally tied the game, and a fluky goal from Connor Toomey just 22 seconds into overtime gave the Warriors their eighth win of the season. Despite the loss, BU coach Jack Parker said he was pleased with his team’s effort.”We had more than enough opportunities to make it 3-1 and we couldn’t do it,” Parker said. “Give them credit. They’re in the midst of a great season and they come out and got the late one and then won it in overtime. Heck of an effort by Merrimack, and I thought it was a heck of an effort from BU too.” The Warriors (8-0-1, 6-0-1 HE) struck first 6:22 into the game when senior goaltender Kieran Millan lost sight of a rebound that squirted out straight in front of him, but an aware Justin Mansfield picked up the loose puck and chipped it past Millan for his first collegiate goal.But Merrimack struggled to stay out of the penalty box in the first period, and BU (3-4-1, 2-3-1 HE) made the Warriors pay for their lack of discipline. Midway through the period, Warrior captain Karl Stollery was whistled off for an interference call. Jordan Heywood followed his captain to the box 1:11 later, giving BU 49 seconds of a 5-on-3. Then Kyle Bigos was called for a cross-check just 14 seconds into the 5-on-3, giving BU over two minutes to capitalize on a two-man advantage. “I wasn’t talking to my team at that point,” said Merrimack coach Mark Dennehy.The Terriers took over a minute to tie the game. They found the back of the net at 11:40 when junior assistant captain Alex Chiasson’s shot caromed off the right post onto sophomore defenseman Garrett Noonan’s stick on the left side of the net. With Cannata pulled to the right on Chiasson’s shot, Noonan had an empty net in front of him and banged the rebound home.BU increased its lead 17:13 into the period when freshman forward Cason Hohmann fed a pass up to junior assistant captain Justin Courtnall, who was waiting right in front of Cannata. Courtnall swiped the puck on his backhand across the top of the crease, coaxing Cannata down, and then dumped it in behind him to give the Terriers a 2-1 lead. “That’s the epitome of what we need right there,” said BU senior captain Chris Connolly. “That’s what makes us a good hockey team, is guys going to the net hard and playing the body. [The fourth line] did a real good job providing energy for us. They were arguably one of our best lines tonight.”After the three-goal first, neither team could find the back of the net until the very end of the third period. Merrimack goaltender Joe Cannata looked particularly sharp, stopping 36 shots and multiple odd-man rushes throughout the game. The Warriors broke the stalemate in the third, when, after sophomore forward Charlie Coyle was whistled off for an interference penalty, Brendan Brodhag tied the game with just 1:56 left on the clock. “I can’t wait until the referee sees that last call [on Coyle],” Parker said. “I’d love to sit in the room when he sees that last call.”In the wake of the loss, the Terriers will have to regroup quickly as they face No. 2 Boston College at Conte Forum for a Sunday matinee. In a season where the Terriers have been inconsistent in their effort from game-to-game, period-to-period and shift-to-shift, BU will have to replicate and improve on Friday’s effort with two important points on the line Sunday.”I hope we can build on this because we played well tonight,” Parker said. “This was not anywhere near the way we played our last couple of games. We played a real top team, and now we’re playing an even topper team [Sunday].”