I remember him shaving his head for a movie a few years ago, its about dragons, I cant remember the title for now. He looks so much better shaved.
Yeah it's cool to see the stars with a shaved head. Looks good.
What pisses me off is the fact that he's concealing it. Take that damn ball cap off already!
What pisses me off is the fact that he's concealing it. Take that damn ball cap off already! 
hey joe: i'm with ya on that. once U go sly... i cannot imagine "hiding" it. i would show off with pride. i know i do.

WARHAWK
That's cool, but leave the cap in your pick-up. Guys with ball caps are just like squirrels, the woods is full of them.
I think he's wearing the caps and beanies to hide hair transplant scars. It's no secret that his hair was pretty thin in the 90s and then all of a sudden he showed up with this thick mane of blonde curls. If he had to shave the mop off for a role and he did get a transplant then he probably has scars. The scars can be hidden with make-up when he's shooting a movie but that can be a pain the butt to do on a day-to-day basis.