The Bruins haven’t been exactly airtight in their own zone the last two games, but there’s nothing wrong with their offense.

After scoring five goals in a losing effort on Thursday, the B’s pulled away from the Tampa Bay Lightning to capture a 7-3 victory in the Garden in a game that was more tense than the final score indicated.

Trent Frederic scored a pair of goals to lead the B’s.

The B’s took a 4-3 lead into the third period almost immediately took their third two-goal lead of the game. After kicking the puck around dangerously in their own end, Hampus Lindholm lugged the puck out and made a good neutral zone pass to David Pastrnak, who made a soft dish to Morgan Geekie. Geekie gave it one touch, then ripped it over Andrei Vasilevskiy’s blocker at 1:35.

The B’s were doing a decent job of killing the clock until Jesper Boqvist was called for slashing with 4:47 left in regulation. Jon Cooper pulled his goalie to make it a 6-on-4, but the B’s got a huge break. Victor Hedman’s stick blew up on him at the blue line and Jake DeBrusk pounced, skating it to the red line and hitting the empty net with 3:26 left.

With Vasilevskiy back in the net, Charlie Coyle buried a breakaway goal with 2:46 left and that wa good enough.

The opening minute looked like the B’s might be ready to repeat their disastrous first period of Thursday night against Pittsburgh, but they managed to take a a 2-1 lead into the first break.

Just 21 seconds into the game, Tampa took the first lead of the game thanks to Bruin sloppiness. With Tampa pressuring right off the hop, Brandon Carlo made a short pass to Geekie behind the Boston net and Geekie tried to relay it to Lindholm, but Nikita Kucherov picked it off. He got it out to Brayden Point, who roofed it past Linus Ullmark.

But the B’s pulled even at 4:52 on the final seconds of a power play. Frederic, who’s been playing well lately, was rewarded with some power play time and he didn’t disappoint. Kevin Shattenkirk sent a pass down in front of the net to Frederic, who made a nifty spin to his forehand to beat Vasilevskiy for his first PP goal. It was Frederic’s 11th of the season

Frederic was in the middle of the B’s go-ahead goal, though not on the scoresheet. Frederic carried the puck through the neutral zone and took a big hit from rookie defenseman Emil Martinsen Lilleberg to move it into the Tampa zone. Matt Poitras, in his first game back from the World Juniors Championships, and Danton Heinen won a puck in the right corner, with Heinen dishing it up to Charlie McAvoy at the point. With Frederic hanging in the slot, McAvoy’s shot eluded Vasilevskiy for his fourth of the year and the B’s had a 2-1 lead at 14:56.

Frederic gave the B’s a 3-1 lead at 1:49 of the second period. Matt Grzelcyk sent him in from the left wing. Vasilevskiy stopped his original shot, but with Heinen battling in front of the net, Frederic was able to bank in the rebound off the goalie.

Believing the whistle was blown before the goal, Cooper went ballistic on the refs after the goal and earned a two-minute minor, but the B’s were not able to capitalize.

The team then traded goals on a 4-on-4. The Bolts got back to within a goal at 7:53. DeBrusk couldn’t corral a loose puck out of the corner and Ullmark came out to poke it away but couldn’t beat Kucherov to it. The Bolt star dragged it and put it into the empty net.

But the B’s regained the two-goal lead just 30 seconds later. Pavel Zacha sent Pastrnak off on a partial breakaway. With Darren Raddysh on his left hip, Pastrnak protected the puck and snapped it past Vasilevskiy’s glove.

Tampa wouldn’t go away, however. They got it back to within a goal on a another great play by Kucherov. Off the rush, he turned Lindholm on the right wing and then sent a beautiful backhand pass to Point on the left wing and he beat Ullmark from the circle at 15:53.