Weighted ball question

My son did the off season program and just used the balls for recovery in season.

During the summer and fall he did I think the weeks 3&4 of the On Ramp program for maintenance a couple times a week. He wants to do it now during the HS season but the throwing volume for practices and games is wildly unpredictable.

in season, my 2023 uses the plyos as part of his warmup.

My 2022 is on remote training directly with Driveline.  I know he uses plyos in both his warm up and recovery work.  I will ask, or peek at Traq, to see what else he is doing between outings.  I may not know for sure until we settle into district play and the throwing rotation is more predictable.