NFL players are not required to wear mouth guards.
The only starting quarterbacks that I can think of off the top of my head that wears a mouthpiece was Andrew Luck, and Cam Newton.
The reason it’s advised is because at the NFL level, people are faster, stronger, smarter, and hit much harder than they do in college.
So wearing a mouthpiece keeps you from knocking your teeth out when taking a monster hit from a defensive lineman.
But if you’re going to wear one, at least have some fun with it.
That’s exactly what Seattle Seahawks rookie receiver DK Metcalf did.
Flip the Page to see the Pacifier: