My very white teenage grandson has his hair cut tight on the sides, as does his football team mates. It seems to be the style.
Houston is hot and humid as all get out during the summer, makes no sense to have a big mop of hair down here, nothing but sweat.
Looks like a version of the military hair cut. It cuts down on head lice too.
The son of Rick Harrison from the History channel has it that way. I noticed the haircuts start to appear when the show Vikings did.