I've just started to lose hair directly at where I would part my hair down the middle as a kid.. I'm 33 and have always had a full head of hair and it's scaring the **** outta me. lol
I hated it at first, but when I talked to my Doctor when I was balding in my early 20's (Imagine being 23 and going bald, I wanted to cry!), he said the helmets from sports might have played a tiny part in it, but when we did tests, it was because I had high testosterone levels (still do) which leads to baldness. Literally no one in my family is bald. I have a scar on my hair line (my fiancee digs it) and a few other scars but overall my head shape is normal like Getzlaf, so it looks fine. I mean I save a ton with not buying shampoo, conditioner and getting haircuts, lol. I learned how to use a straight blade in my teens so I don't even spend money on blades really.
But yeah, a ton of hockey players bald, seems normal I guess. Could be because of both reasons too, high testosterone or hereditary reasons or helmets.
Come to think of it, I am rocking the Getzlaf I guess...I got my playoff beard going too, but more gray in it, or as my friends call me "Greybush"...it's very Scott Niedermayer during the Ducks run, just the middle being white though. I'm old, meh.