Track coach may not like it because of his size but you will be amazed at how much a lot of kids get in running even if it’s just one year. In his case he might need to negotiate with the track coach to let him run sprint events and he will try shot and discus. He doesn’t have to even run in any meets. Just practicing the sprints and learning how to sprint and how to run will help him gain speed that he might not otherwise get because of his form, stride, etc. at 6’2 or taller and running a 4.5 by his JR year and he very well could end up with a lot offers.