Age 14 son had left wrist bone age xray. results state his bone age is 17 but do not state that growth plates are closed. any hope for further growth?

Yes: The major mechanical determinant of height is how long the longest bones in the body, like the femur (thigh) and tibia (leg), become. At the ends of these bones are the growth plates that appear like open spaces on x-rays when growth is ongoing but close when growth is completed. If the growth plate on your son is still open, there is potential for further growth.

Not much: A male bone age of 17 signifies that the growth centers are in the process of closing. It corresponds to a slow down of growth to less than an inch/yr. There is some potential as long as the growth plates are open but don't expect much. At a BA of 17 in a 14 yo it appears he entered puberty early.