Rookie Lightning defenseman Nick Perbix broke Kuemper's shutout spell with 7:51 left, scoring on a one-time from above the left circle.
A couple of minutes later, a line brawl ensued after Tampa Bay's Ross Colton issued an emphatic cross-check to Carlson's back. Three players from each side went to the box, including Mantha, who filled out the Gordie Howe hat trick with a fight against the Lightning's Corey Perry.
With 2:15 left, Milano finished off the scoring with a shot from the top of the paint that took a fortuitous bounce and went in.
Coming into Friday's game, Kuemper had posted a sparkling 2.01 GAA and a .931 save pct. in his previous six starts, but some spotty run support resulted in a 1-4-1 record over that stretch. He got more than enough support tonight, and his teammates also blocked a total of 22 shots, with half of those coming in the first period.
"As a group, we came together with the urgency that we really wanted this win," emphasizes Kuemper. "And you could see it in our play right from the start, and it was nice to see everyone get rewarded."
Where one team is pleased with its 5-on-5 play, the other one typically is not, and that was certainly the case tonight.
"Our 5-on-5 play," says Cooper, when asked what hurt his team the most on this night. "We actually weren't in bad shape. We didn't score on the five-minute major, but we had our chances, we had some good looks. It was unfortunate that they scored right after that, so a little bit of a momentum killer.
"But our [defensive] zone play - as good as it was the other night - it wasn't where it should be tonight. Too many shortcuts in the [defensive] zone, and it cost us."
The two teams tangle again on Sunday night at Tampa's Amalie Arena.
Milestone Men - Carlson's helper on the first Milano goal was the 600th point (134 goals, 466 assists) of his NHL career, pushing him past Michal Pivonka (599) for sole possession of fifth place on Washington's all-time scoring list. Carlson achieved the feat in the 897th game of his NHL and Capitals career.
"It's an incredible accomplishment, I think," says Carlson. "I think most everyone would sign up for it coming into their careers. It's been a fun ride with a lot of crazy experiences, and I'm just glad to do it here."
Jensen's assist on the Protas goal was the 100th point of the blueliner's career. After totaling 43 points (six goals, 37 assists) in 190 games with Detroit, Jensen has amassed 57 points (eight goals, 49 assists) in 233 games with the Caps.
Going For The Gord -Mantha's Gordie Howe hat trick was the second of his NHL career; he had two goals, an assist and a fight on Nov. 15, 2017 in an 8-2 win over Calgary when he was a member of the Detroit Red Wings. Ex-Cap Mike Green assisted on both Mantha goals that night, and Mantha finished the night with 25 PIM, earning a pair of game misconducts to go along with his fighting major.
Mantha's Gordie Howe hatty was the first by a Capital since Tyler Lewington pulled it off in Ottawa on Dec. 29, 2018. Lewington was the first Caps defenseman to achieve the feat since … wait for it … Mike Green, who did so on April 15, 2008 in a first-round playoff game against Philadelphia, Game 3 of that series.