Since the 1992 Super Bowl, only one Washington team in a major pro sport has reached the final four in its playoffs. That’s 1 for 85, not that we’re counting.

In the past couple of weeks, five players have arrived in D.C. As a group, they have addressed the points of greatest vulnerability of the Capitals, Wizards and Nationals. Rarely do you see a team get a puzzle piece at a crucial time of the year that perfectly answers its greatest need. Now, three in one town have.

Say hello to all-star defenseman Kevin Shattenkirk of the Caps, instant-offense sixth man Bojan Bogdanovic and point guard Brandon Jennings of the Wizards as well as all-star catcher Matt Wieters and set-up standout Joe Blanton of the Nats.

Catalyzed by these new men, is Washington about to see one, two or even three teams reach the final four in its sport within a span of several months?

(Yes. Shhh, nobody heard that. The Caps are Stanley Cup favorites. The Nats have fourth-best odds to win the World Series. The Wizards are third in the East now. The Redskins can’t even get in the Top Teams discussion.)

Defenseman Kevin Shattenkirk vies for the puck against New Jersey center Adam Henrique. (John McDonnell/The Washington Post)

By trading valuable draft picks for Shattenkirk, the ability and depth of Caps defensemen just went from “good but shallow” to “!!!” Now, it’s just another strength on a club that suddenly has no clear flaw. Before the trade, you might ask, “How will they blow it this time?” Now, you wonder, “How do you beat them?”

[Alex Ovechkin hasn’t scored an even-strength goal in 15 games]

The Caps can lose. But consider how rare it is in any sport to see a team remain on the very top shelf for 10 straight seasons and never even play for a title. In the past decade, only the Penguins (987) have more regular season points than the Caps (985). The Blackhawks have fewer points (980) but three Stanley Cups. In the decade, even San Jose, the other frustrated NHL power, played for a championship.

The Wizards may be the city’s most transformed team. For months they had five gifted starters, risking exhaustion, with zero bench behind them. They were fun but, when you thought “playoffs,” not fully serious. Lack of depth kills you.

Now the Wizards have so many people contributing, with 6-foot-11, 250-pound free agent Ian Mahinmi finally healthy, too, that Kelly Oubre Jr., the only reserve bright spot the first 50 games, hasn’t always been able to earn much playing time.

The dream of any team with an awful bench is, somehow, to acquire players who are starters, or have been starters for most of their careers, for other teams. But how do you pull that magic trick without weakening your team? Let’s give a hug to much-pummeled General Manager Ernie Grunfeld. He’s been a wizard.

The 6-8 Bogdanovic, 27, started for Brooklyn and averaged 14.2 points. His career “true-shooting percentage,” which includes the impact of three-pointers, is .566. Klay Thompson’s is .570.

Nationals catcher Matt Wieters takes part in a spring training drill. (Toni L. Sandys/The Washington Post)

So, Bogdanovic brings both a starter’s confidence and a pure gunner’s audacity to a team that has good three-point shooters in Otto Porter and Bradley Beal but doesn’t shoot threes in the high volume that most top teams now rain on foes. Bombin’ Bogey, averaging 15.5 points in 24.5 minutes so far could be a remedy.

[Fancy Stats: Bogdanovic gives Wizards a player they haven’t had in years]

Jennings, 27, nicknamed the Pterodactyl, has averaged 14.7 points and 5.8 assists in 520 career games, 427 of them as a starter. A good advanced metric is Player Efficiency Rating, a per-minute measure of all skills combined (15.0 as the NBA average). Jennings’s career mark is 15.8. The fall in pace and quality of play when Wall is on the bench has been huge. Now, not so much.

With the return of Mahinmi, the Wizards have added three players who, in some years, might have been starters. Now they’re the bench.

This was a confident team before help arrived. Now, in the LeBron-Then-Everyone-Else Eastern Conference, the Wiz have a good chance to beat anyone in their path, including Boston and Toronto, to get to the conference finals. They might not, but there’s no reason they cannot.

The Nationals may finally have gone from overrated (on potential) to underrated (on actual performance). The Nats won 95 games last season and were two wins “unlucky.”The previous season, they were six wins unlucky in an 83-79 year. That’s due to revert to the mean with one-run wins.

A good expression of core franchise strength is multiyear run differential. The past five years, the Nats and Cards outscored their foes by 517 and 509 runs. No other team has more than a plus-255 run differential. That gap is nuts. In October, it has translated for the Cards into a World Series win, an LCS loss and four playoff trips. The kinda-sorta-coulda been the Nats. It wasn’t. But the strength exists.

Since the start of 2016, the Nats have upgraded at shortstop and center field from Danny Espinosa and Denard Span to Trea Turner and Adam Eaton. Daniel Murphy has emerged as a star. Young pitchers such as Koda Glover and Sammy Solis have upgraded talent. But Wilson Ramos had to be replaced and a proven reliever had to be added, preferably a closer.

Wieters, the last true bargain available in free agency, was like a gift falling out of the sky. His four all-star appearances may exaggerate his career a bit, but he’s a brainy, switch-hitting strong-armed catcher who has seen the value of clubhouse chemistry in Baltimore. Mix a portion of Wieters with two dashes of the energy-and-speed of Eaton and Turner, then blend in the grit of Murphy, Bryce Harper and Jayson Werth. Could you see the first real don’t-tread-on-me Nats club?

[Blake Treinen may prove that nice guys can finish the last inning]

The Nats still haven’t identified a closer. But with Blanton, they now have enough proven sub-3.00-ERA arms to make a good bullpen if roles can be defined.

Now, all three Washington teams face the same challenge: integrating their new players. That’s far from a cinch. Shattenkirk will see plenty of ice time, including the power play. Will he blend by playoff time? Or by the second round when the pressure probably starts to arrive.

Can Wizards Coach Scott Brooks, in 20 more games, take three new pieces and make them part of an eight- or nine-man rotation that appears seamless by the time you may face the Boston Celtics in the playoffs? Can Dusty Baker, who says he has the pieces he needs to build a good bullpen, find the right order of march for his men?

For a quarter of a century, almost every Washington team in every sport, if it even got to the playoffs, was worrying about what it didn’t have. Sometimes, in the case of the Caps, what was missing may have been internal.

Now, three D.C. teams — simultaneously — have added the key players to provide the caulk to fix their final visible cracks. They lack no major thing, except cohesion, morale and some good fortune, to reach their sport’s final four. Or maybe more.

It’s a three-ring show we’ve never seen before. For now, there’s still time for getting-to-know-you. But soon, maybe for much of this sports year, the drama should become very real, month after month. We’re not used to it. Get ready.

For more by Thomas Boswell, visit washingtonpost.com/boswell.