You've probably noticed more neon plastic sticking out of hitters' mouths lately, leading to the common question: do baseball players wear mouthguards because they have to, or is it just a personal preference? If you grew up watching the game twenty years ago, you rarely saw a player with a mouthguard unless they had some serious dental work to protect. Today, it's a completely different story. From the local Little League fields to the bright lights of the MLB, mouthguards are becoming as much a part of the uniform as a sliding mitt or a pair of high-end sunglasses.
The short answer is that while it isn't a mandatory rule in professional baseball, a huge number of players are choosing to wear them. It isn't just about protecting teeth from a stray fastball, either. There are actually a few different reasons why a player would want that extra layer of protection between their upper and lower jaw.
It's more than just dental insurance
When you think about mouthguards, you probably think about football or hockey—sports where people are constantly smashing into each other. Baseball is a "non-contact" sport, at least on paper. But anyone who has played the game knows that "non-contact" is a bit of a lie. You've got 95-mile-per-hour fastballs flying toward your face, players sliding spikes-first into second base, and outfielders colliding at full speed while tracking down a fly ball.
If a pitch gets away from a pitcher and heads toward a hitter's chin, a mouthguard can be the difference between a scary moment and a life-changing injury. Even if the ball hits the helmet's face guard (the "C-flap"), the sheer vibration and impact can cause the teeth to slam together. A mouthguard acts like a shock absorber for the jaw. It cushions that impact and prevents the teeth from shattering or cutting the inside of the cheeks.
The "clinching" factor and performance
This is the part that surprises most casual fans. A lot of players don't wear mouthguards just for safety; they wear them for performance. Think about a pitcher winding up to throw a heater or a hitter swinging for the fences. What's the one thing they almost all do? They grit their teeth.
When you exert a massive amount of force, your natural instinct is to clench your jaw. This is called "bruxism" in the medical world, but in sports, it's just called playing hard. The problem is that clenching your teeth that hard, over and over, can lead to massive headaches, jaw pain (TMJ), and even worn-down enamel.
Some players find that wearing a custom-fit mouthguard actually helps them track the ball better. It sounds crazy, but by stabilizing the jaw and reducing tension in the neck and face, they can stay more relaxed through their swing. When your jaw is relaxed, your body is generally more fluid. In a game of millimeters like baseball, that tiny bit of extra comfort can actually make a difference in a player's stats.
Concussion protection: Fact or fiction?
There has been a long-running debate in the sports world about whether mouthguards help prevent concussions. While the science is still a bit mixed, many trainers and players believe that a mouthguard helps "seat" the jaw in a way that absorbs some of the force from a blow to the head.
In baseball, concussions usually happen during collisions at the bags or when a catcher takes a foul tip off the mask. If a player is wearing a mouthguard, it might help dissipate some of that energy before it rattles the brain. Even if the scientific community hasn't 100% confirmed that a mouthguard stops a concussion, many players figure it's better to have that extra layer of protection just in case. It's one of those "better safe than sorry" situations.
The shift in baseball culture
A decade ago, you might have been teased in the dugout for wearing a "football" mouthguard. Baseball has always been a game steeped in tradition, and change happens slowly. But the culture has shifted. High-profile stars like Francisco Lindor and Fernando Tatis Jr. have been seen sporting mouthguards, and when the stars do it, the younger generation follows.
Nowadays, mouthguards are actually a bit of a fashion statement. You'll see them in team colors, with custom designs, or in bright "look at me" neon. It's become part of the "drip" that players care so much about. Beyond the aesthetics, the youth level has seen a massive uptick in usage. Parents are much more aware of sports injuries now than they were in the 90s. If a twenty-dollar piece of plastic can save a three-thousand-dollar orthodontist bill, most parents are going to make sure their kid is wearing one.
Different types for different players
Not all mouthguards are created equal. You won't see MLB players wearing those bulky "boil and bite" guards you find at the local drugstore. Those things make it hard to breathe and even harder to talk to your teammates.
Instead, most pros use custom-molded mouthguards. These are thin, low-profile, and designed to allow the player to speak clearly. Communication is huge in baseball—infielders need to call out plays, and catchers need to talk to their pitchers. A custom guard stays clipped to the teeth, so it doesn't fall out when someone is shouting "I got it!" under a high pop-up.
There are also "lower" mouthguards that only cover the bottom teeth. Some players prefer these because they are almost invisible and don't interfere with their breathing at all. They still get the benefit of jaw stabilization without the bulk of a traditional guard.
Why don't all players wear them?
If they're so great, why isn't every single person on the field wearing one? Well, some guys just find them annoying. If you've spent twenty years playing the game without one, suddenly having a piece of silicone in your mouth can feel distracting. Baseball is a game of extreme focus, and if a player feels like they can't breathe quite right or if they're constantly fiddling with the guard with their tongue, it's going to hurt their game.
There's also the communication aspect. Some catchers, for example, find it hard to give complicated instructions to a pitcher while wearing one. And let's be honest—some players are just old school. They grew up in an era where you just took your lumps, and they aren't interested in adding more gear to their bag.
The bottom line
So, do baseball players wear mouthguards? Absolutely, and in greater numbers than ever before. Whether it's for the genuine fear of a 100-mph projectile, the desire to stop grinding their teeth during high-stress moments, or just because it looks cool, the mouthguard has officially arrived in the dugout.
As the game continues to get faster and the athletes get stronger, the emphasis on safety is only going to grow. We might even see a day where they become mandatory at the youth levels, much like batting helmets did decades ago. For now, it's a personal choice—but it's a choice that's saving a lot of smiles and probably a few careers along the way. Next time you're watching a game, keep an eye on the hitter as they step into the box. You'll likely see them pop that guard in, bite down, and get ready for the heat.