March Madness Rules: What NCAA Players Can and Can’t Do During the Tournament

March Madness rules, NCAA basketball restrictions, and tournament guidelines are about more than just what happens on the court. While fans focus on buzzer-beaters and busted brackets, players have to follow a surprisingly detailed rulebook that covers everything from fingernails to fashion choices.

Yes, really.

Every year, NCAA athletes competing in the tournament are expected to stick to strict guidelines that keep the games fair, safe, and, apparently, free of long nails and dangling jewelry.

Some of the rules make total sense. Others might leave you doing a double take.

For starters, players are allowed to fill out their own March Madness brackets, just like the rest of us. The catch, no money can be involved. Betting on games is strictly off-limits, and breaking that rule could come with serious consequences. So if you thought your office pool was stressful, imagine risking your eligibility over it.

When it comes to appearance, the NCAA keeps things pretty locked down. Jewelry is a no-go during games, and headwear is limited to specific types of headbands. Even small accessories like barrettes and bobby pins are not allowed, likely to prevent injuries during play.

Uniform rules also differ slightly between men’s and women’s teams. Men are required to tuck in their jerseys, while women typically are not, mostly because their jerseys are designed shorter.

Then there is the fingernail rule, which might be one of the more unexpected ones. Players have to keep their nails trimmed and not “excessively long.” They can still paint them, so there is some room for personal style, but length is where officials draw the line.

Some rules are more about gameplay and sportsmanship. Players are not allowed to lift or carry teammates, which sounds obvious until you picture a celebratory moment getting a little out of hand. There is also a strong emphasis on respectful behavior. Poor sportsmanship can lead to penalties, so keeping emotions in check is part of the job.

And finally, tobacco use is completely prohibited. No exceptions.

At the end of the day, these rules might seem quirky, but they are all part of maintaining fairness and safety during one of the biggest sporting events of the year. So while fans argue over brackets and Cinderella stories, players are busy making sure their jerseys are tucked, their nails are trimmed, and their focus stays on the game.

SAN DIEGO, CALIFORNIA – MARCH 22: Dylan Darling #0 of the St. John’s Red Storm shoots the ball against Elmarko Jackson #13 and Flory Bidunga #40 of the Kansas Jayhawks during the second half in the second round of the 2026 NCAA Men’s Basketball Tournament at Viejas Arena at San Diego State University on March 22, 2026 in San Diego, California. (Photo by Sean M. Haffey/Getty Images)

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