Again, to me it depends how he was used. The time frame you are mentioning is about 4 1/2 months assuming April was not a full month. If the pitches were evenly distributed over the season that is about 53 pitches a week. I seriously doubt it happened this way. You obviously have a concern with the amount of usage. So rest him for 3 or 4 weeks. Unless the usage was piled up at the end of the season and his arm is tired or sore I wouldnt rest him from throwing at all. This doesnt mean he would be max long tossing every day, but, playing catch and keeping his arm in shape is good. Again, nothing on a mound really needed for a good while, but, throwing is different. I dont think a pat answer like EVERY kid that plays baseball and pitches should rest 2 months no matter what is worth anything. But, thats just my opinion.