Zion Williamson’s next dribble will be in the NBA. RJ Barrett’s next dribble will be in the NBA. Duke was the latest poster boy for one-and-done. But as March Madness turns into April Sadness, Williamson and Barrett will be watching their one and only opportunity to experience “One Shining Moment.”

John Calipari, Mr. One and Done, has won one national championship in his 10 years at Kentucky. Seven players from his 38-1 2015 team that fell two wins short of a championship declared for the NBA that spring.

A year ago, Sister Jean of a Cinderella Loyola-Chicago team was the marquee star of the Final Four. Villanova won its second national title in three years with experienced players like Jalen Brunson and Mikal Bridges and the culture and program and coaching of Jay Wright.

And now? Now we have ourselves a Final Four populated with players who won’t have NBA executives drooling, who can’t be found on YouTube highlights, whose sneakers probably won’t explode at any given moment.

And that’s OK.

Just because you don’t have sizzle doesn’t mean you can’t have steak.

It will still be worth watching, even if your brackets have been decimated.

The stakes are still the same, and we forget sometimes that basketball played the right way, by college kids who treasure the exhilarating journey and play every game as if there is no tomorrow — their version of one-and-done — can be beautiful to watch.

You liked “Hoosiers,” didn’t you?

You have two teams playing in their first Final Four, and you can wrap your arms around Destiny’s Darlings, can’t you?

From 68 teams, we are down to four. The thrill of victory and the agony of defeat will be even more pronounced for them Saturday night and Monday night.

Michigan State knocked out Duke without a Magic Johnson. Michigan State knocked out Duke with a together band of Tom Izzo cult followers who have learned through osmosis from their Hall of Fame coach how to share the ball and play smart and be disciplined at both ends of the floor and be mentally tough. Cassius Winston, a tournament and Izzo-hardened junior, knew exactly what to do with the basketball over the final seconds to run out the clock after Barrett unintentionally made his second free throw. Winston is a very good college guard, a very good college guard who has been through the wars.

“We usually don’t get the top of the top,” Izzo said at the end of his press conference Sunday. “These guys have just kind of earned their way. They weren’t given anything. They earned their way, and that’s what I think veterans do. I talked to Jay Wright about it a lot a couple of years ago. And that theory of getting old — I don’t want to get old, but it’s nice when my players do.”

Coach K: “I thought they played older than we did.”

The Spartans will meet Texas Tech. The Red Raiders are in their first Final Four mainly because they’re the type of team that would have the Garden crowd chanting “Dee-fense, dee-fense.” They will be in Minneapolis mostly because of sophomore guard Jarrett Culver and senior guard Matt Mooney, not to mention the elite coaching of Bob Knight disciple Chris Beard.

Virginia? You remember Virginia, don’t you? The first No. 1 seed to lose to a 16-seed last year? Devastation City baybeee, as one legendary television analyst might say. Tony Bennett can’t trot out Ralph Sampson, who watches the games proudly from the stands. But Bennett has a band of brothers who play together, who play for one another, who overcome offensive shortcomings with their Pack Line defense, who deserve our praise for breaking through a Final Four psychological barrier that threatened to leave them frozen with fear. Kyle Guy, the kid who spoke openly about his battle with anxiety, and Ty Jerome, the kid from New Rochelle, are junior guards. De’Andre Hunter, a possible top-10 NBA pick, is a redshirt sophomore.

Bruce Pearl doesn’t have a Chuck Person (which isn’t exactly a bad thing these days since the former Auburn assistant is facing prison for pleading guilty to conspiracy to commit bribery — the dark side of college basketball that forever lurks in the shadows). What he does have is a 5-foot-11 roadrunner junior guard named Jared Harper and a senior guard named Bryce Brown who buried Calipari’s Kentucky and somehow got fallen brother Chuma Okeke (torn ACL against North Carolina) to the school’s first Final Four. Assistant coach Steven Pearl, son of the head coach, told his players that the magnitude of the stage would be the demise of Kentucky’s freshmen class, and he was right. Ashton Hagans, the top point guard in the Class of 2017, committed seven turnovers. Tyler Herro, the precocious freshman marksman from Milwaukee, was held to seven points.

Calipari’s master stroke of embracing 23-year-old grad transfer Reid Travis was not enough to help sophomore thoroughbred PJ Washington. The one-and-done coaches are tasked with building a cohesive unit before the college shot clock expires while simultaneously developing their Diaper Dandies — Dickie V for president — for the NBA.

Coach K’s forced entry into the Land of the One And Done (Jahlil Okafor, Justise Winslow, Tyus Jones) resulted in his fifth NCAA championship in 2015. He’s only the greatest coach of his generation. He’ll again be watching this Final Four.

As wondrous as Zion was, he failed to have the immediate impact on the sport that Kareem Abdul-Jabbar did when he was Lew Alcindor. There can be no Walton Gangs in this day and age in college basketball. The great coaches will still be great coaches even when the NBA scraps its 19-year-old age limit. They’ve learned and we’ve learned that it will guarantee little in March and April.

It will be months before Zion takes our breath away. He’s done. After one. The Final Four will survive and advance without him.