Thanks for the replies.
Well the doctor said they don't do anything. No cast, no surgery, no splint.
Which surprises be because there is a 1 cm gap between the actual femur bone and his lesser trocahnter. The lesser trochanter is what hold his thigh tendons on, so it is just basically floating. (well there other tendons holding it on but no bone structure)
He said to keep weight off of it and that it would be very painful.
My son really isn't in any pain, he isn't even taking the prescribed medicine (hydrocodone)
Well, I hope there any long term issues because he is into all sorts of sports and other activities.