I'm with Fenwaysouth, Golfman. JP was kinda like your son at that age -- with the added stress of a cage in the backyard
.
I kept telling my wife ... he'll decide when he wants to get serious about the hard stuff on his own; don't push.
I suspected and predicted it would happen when he was 15-16 -- and I was right.
The big question in your case, it seems, is whether basketball is his first love. If it is, our circumstances are different, and I can only offer what I've seen in select ball: Two boys, both tall, lefty, hard-throwing pitchers with lots of upside ... fizzled, because neither one loved baseball like they did basketball.
The hard part for you is ... YOU know his prospects are better in baseball ... but if he doesn't love it, are they really?
I hope he does, and I hope it works out for you like it has for us. IF and when he wants it, he'll leave the xbox for it.
But for the record ... I marvel at the anecdotal lives, via Twitter, of MILB and MLB ball players: They STILL love xbox!