One of the best players of all time, period. But yes, he's a freak specimen. To play his style of game and remain as healthy and effective as he has, from 20 to 34 so far, is nuts.
The guy barely missed any action in his 14 year career so far. Since the lockout in 2012, he has only missed 9 games...7 of which over 2 years. Over his entire career, he has missed 30 games spanning across 15 years thus far. Having such a healthy career is remarkable to begin with, factor in the intense game he plays and it's just borderline a miracle.
Comparing to Crosby, over the same span, he's played 142 less games. If you want to factor PO action, then it's more like 100 games.
No signs of him slowing down either, on pace to easily record yet another 50G+ season.