Monkey,
Did your boy play in Cleburne last Wednesday? If so, you've got a pretty solid group of pitchers. My son pitched in the second game, he was wearing the black shirt.
But back to the original question.......last year we did no throwing all the way through November and early December (except whatever he was doing at school), but he continued his "prime" (conditioning and weights) training 3 times a week, then over winter break, we started gearing up towards the season.
I think that the rest from pitching is good.