I wanted to add a little more food for thought...
1. Ya'll are all still in the "honeymoon phase" It's new & exciting, you want to pinch yourself! "!!! this really happening??"....
2. By year 2-3-4, he has hopefully learned to cope with this crazy lifestyle change, always being broke, learning the ins & outs of finding a place to "share" with 2-3-4 other players, traveling hours on a bus in kind of cramped conditions, poor nutrition mostly...then getting workouts in & 3+ hr games...to be repeated for up to 10 day road trips every other week...for 6 months... 
3. Time...slowly changes ones perspective...This profession is now a job...This is hard, hard, hard work....especially when he thinks he is on the cusp...Does he still have that burn in his gut?...that mental fortitude to keep putting in effort, maybe MORE effort than in the "honeymoon phase"...Is he still as healthy?...have the setbacks "set-in"?
Our only part in our sons' career is to appreciate them, respect them, intercede in prayer on their behalf...