Absolutely.
3rd time in a couple weeks I am going to say it... the amount of basketball a lot of guys play in the "off season" is flat out stupid.
I haaaaaate seeing clips and stories of guys like Durant and Eric Gordon playing high intensity pickup games and international exhibitions. These are guys who constantly struggle with injury during the season, it freaking insane to me that they are out there playing in these meaningless trash games. Booker has done it too... although, I have seen nothing of it this off season, everything I've seen of him has involved sun sets and a beach, and GOOD! Rest up Book!
In recent years the AAU basketball system has begun to take heat for over working players. These guys, with developing, freakishly tall bodies, going through their high school basketball routines and then hitting the AAU circuit, then going right back into high school ball with no rest, they are compiling more miles on their bodies than previous generations.
I have zero doubt that this culture of playing your one sport, non-stop, all year, is a major factor in the huge increase we've seen in injuries over the last couple decades. You're causing stress on the same parts of your body over and over.
25 years ago KJ was averaging about 60 games a year, he was considered a huge injury risk... in the present league he would be considered about par for the course... heck, maybe even durable considering he never needed surgery, it was all strains and sprains.