Son attended HF and the short answer to that question is yes, pitchers throw both days. I'm not sure if I'd say "make you" throw 2 days. I think you'd have the option to just throw day 1 or 2 but you'd most likely only get your 2 innings for that day. That's probably a good question for you to ask the HF team via email. They are very responsive. I can tell you that they have a pitching coordinator who checks on the pitchers each day as they enter the facility (on Long Island) and adjusts schedules as necessary.