I used to think he was so hot before he grew out his hair.
It’s a slightly more elaborate variation of a lacrosse player hairstyle called the flow. It looks nice under a lacrosse helmet.
He was a lacrosse player in college, as he has said in some of his older videos. I’d be surprised if he’s still playing now except in some kind of men’s rec league.
In the 2000s, it was more associated with also having bangs that covered your forehead, in addition to the part at the back. I can’t find examples of that right now, but if you look at Inside Lacrosse magazine from the Bush era, and/or any preppy lacrosse team photos from that era you’d see it with the bangs variation.
EDIT: I edited the post to remove the majority of the pictures because except for the one who clearly plays for Towson University, I can’t verify who’s over 18. It can be hard to tell. Lacrosse players often are very mature and manly looking, early.