The Washington Capitals are on fire right now. They’ve lost only three times since the calendar flipped to 2017 and have outscored their opponents 95 to 44 over that stretch. Aside from an 8-7 overtime loss to the rival Pittsburgh Penguins on Jan. 16, the Capitals have only surrendered more than three goals two times during their hot streak. In a league in which holding the opponent to three goals or fewer will earn you at least a shootout most nights, it’s easy to see why Washington is piling up points in the standings.Not only do the Caps own the league’s best record, but they also have the most dominant stats in hockey. They lead the league in Hockey-Reference.com’s Simple Rating System (SRS), which estimates the strength of every team in the NHL,1Technically speaking, SRS measures a team’s average goal differential after adjusting for strength of schedule. as well as team goals against average, the mark of a stingy defense. They also rank in the top five in several other major statistical categories, including goals scored per game; power play percentage; penalty kill percentage; and Corsi percentage, which estimates a team’s all-important possession rate by measuring the percentage of shot attempts it directed at the opponent’s net during games.2Adjusted for score, zone and venue.This is all to say that the Capitals look really, really ridiculously good on paper. But they’ve also ranked highly in a few key stats that are traditionally more in the realm of luck than skill. For example, they’re No. 1 in PDO, which is the sum of shooting percentage and save percentage (a notoriously unstable indicator in stathead circles), both of which the Capitals also either lead the league in or are tied for No. 1. Ordinarily, a high PDO could be seen as a red flag — suggesting that a team’s statistical résumé is like a house of cards, ready to collapse at any moment. But in Washington’s case, the team even seems to have come by the percentages that make up PDO (mostly) honestly. It’s the consequence of a roster design that could mean it’s finally Washington’s year to hoist Lord Stanley’s cup.The Capitals’ statistical excellence is nothing new — in each of the past three seasons, they’ve ranked among the NHL’s top eight in both points and SRS. Perhaps even more telling, they’ve been among the NHL’s top three in PDO for the past two seasons. Their good fortune in the percentages is commonplace by now.So how do we know Washington’s success isn’t purely based on good luck? For one thing, they’ve assembled a roster that perennially shoots the lights out. The Capitals have finished outside of the top 10 in shooting percentage only once since 2009-10. And since Barry Trotz took the helm as head coach in 2014-15, the team has ranked no worse than fourth. Only the Dallas Stars outperformed the Capitals in shooting percentage in both 2014-15 and 2015-16, but while the Stars have regressed — they sit in the middle of the pack (12th) in 2016-17 — the Capitals continue to put the puck in the net with a high degree of efficiency, thanks to that group of good shooters.A handful of said marksmen are having personal best shooting percentage seasons: T.J. Oshie, whose career shooting percentage of 13.1 percent is good for 24th among active players, is scoring on 23.7 percent of his shots in 2016-17. Frequent playoff hero3This is one of the reasons the Capitals signed him. Justin Williams has a career shooting percentage of 9.7 percent, but he’s scoring on 15.7 percent of his shots. Left winger Marcus Johansson has a career shooting percentage of 14.0 percent but is scoring on an astounding 22.9 percent of his shots. And he looks poised to shatter his career high mark for goals in a season. Some of that overachievement is bound to regress to the mean, but if the Caps’ history as a team is any indicator, Washington should be able to hold onto at least some of their improvements.That’s just one of PDO’s two (usually unstable) components. The other half of the Capitals’ brilliant, odds-beating equation is goaltender Braden Holtby. Holtby is among the best netminders in the world (his career save percentage is third-best among active goalies), and he’s only getting better. His goals against average and save percentage are both better than they were last season, and if it weren’t for Minnesota Wild goalie Devan Dubnyk’s ridiculously impressive performance in 2016-17, Holtby would be a lock for a second consecutive Vezina Trophy. Goaltending statistics can be notoriously fluky, but they tend to be more stable over a career, particularly when they’re as consistently great as Holtby’s have been.The main criticism of the Capitals — and especially their captain, Alex Ovechkin — has been that they’re playoff underachievers.4It’s hilarious to assign an “underachiever” tag to a guy who ranks sixth all-time — and first among active skaters — in goals scored per game. Alexander Ovechkin is a gift and a once-in-a-generation talent, and every hockey fan on Earth — Washington Capitals fan or not — should cherish his existence. They’ve qualified for the postseason in eight of the past nine seasons but haven’t managed to get past the conference semifinals despite having rosters stacked with such quality players as Ovechkin, Oshie, Evgeny Kuznetsov, Alexander Semin (when he was actually good), Nicklas Backstrom, Mike Green (when he was actually good), and Holtby.When juxtaposed against the Capitals’ inability to make a deep playoff run, Washington’s degree of statistical dominance suggests that, sure, perhaps the team has underachieved a bit. But there’s no doubt that Trotz and general manager Brian MacLellan have built a team poised to succeed in the modern era of the NHL. Not only do they have a group that controls the puck well, but they’ve also hacked through the noise of PDO to assemble a roster that isn’t just lucky when it beats the percentages. Who knows if the Capitals will win the Cup this year, but they’re a legitimately dominant team and, as things sit now, championship favorites. Maybe this is the year they finally shrug off the underachievers tag and deliver on that promise.