It sounds like a good opportunity for your son to contact the coach. Does he mean he wants him to take the tests again and apply to get in without his support? Or will he still support him, in RD, if the scores hit a certatin bar?
If it helps, my son had a similar suggestion from one Ivy coach who had been very supportive and helpful along the way, but the bottom line for that particular college was that they had all the recruits they could take. If my son applied and got in on his own, he was told he would have a very strong opportunity to try out in the fall, because they always need a certain # of walk ons. (This one has a low limit on the slots for baseball.) He is not opting to do so, and wouldn't get in on his own.
On the other hand, another Ivy is still 'acting like' they are actively interested in him, even though it is past the Likely Later and ED date. Not sure what that is about but he is not pursuing it so I don't have any more info on that front.
(BTW,given where I live, those ED deadlines have all been extended post-Sandy but that is not the case for you in FL.)
Have your son give a call, it can't hurt to ask!