Off Day Pitching Ideas

I am a high school coach and want to know what you guys do post game pitching days until the next start.
Besides throwing pens, long toss, pickoffs, running, abs…is there anything else I can incorporate for my pitchers? How about specific running or core training…pitching mechanic stuff…mental side?

How about pitcher’s fielding practice? They should practice fielding bunts using proper footwork and throwing to each base - especially 1B and 2B. They should also practice covering 1B on hits to the right side.

Your running should consist of two types of running. After a pitching performance as well as the next day, the pitcher should do some light jogging to promote blood flow for arm recovery. Other days the pitcher should do some sprints as the explosiveness of sprinting more closely relates to and benefits pitching.