EXCLUSIVE

When Tyrod Taylor starts his 1st game with the Buffalo Bills, he's be doing in style -- with a customized DIAMOND mouth guard ... TMZ Sports has learned.

Tyrod hooked up with dentist to the stars Dr. Michael Wright -- who says he made a special piece for the 26-year-old ... "It will be blinged out with diamonds."

Don't worry, Wright says the diamonds are coated with a protective layer that prevents the rocks from damaging his mouth. He's actually made similar pieces for other star athletes.

There's more ... the piece is also equipped with a magnetic strip inside the guard so it will stick to Tyrod's helmet ... or anything else that has metal in it. No more mouthpiece straps.

Good luck!