Cabbage. I believe ASMI has guidelines based on age, as the overuse concerns are primarily for kids who are still developing physically. (not exclusively of course)
My son’s college team has the pitchers resting when they first get back to school, since as you say, many pitchers were pitching into August with their summer teams. They focus on strength and conditioning, and then start throwing in October for the fall practices later in Nov. I also think in the max fall the innings will be 3-4. After Thanksgiving they start a sand ball program that works on specific muscle in the throwing motion particularly on the decelerators. He actually won’t pick up a ball until he goes back in January, but his arm will be conditioned when he gets back.