I think there will not be very many states that play high school football in Fall 2020. What about having a "split season" for HS baseball in 2020-2021 in those cases? Schools could play about half of their season from late September to early November (adjust for the weather in your state). Do not play any games that count toward seeding of any playoffs. If spring seasons are compressed and baseball is delayed to starting in May, then play the other half of the season and your playoffs.
I would think such a plan would need to be implemented fairly soon, but almost any pitcher who would pitch JV or varsity has not shut down from summer ball and probably does something in the fall. Maybe some would rather play fall travel ball, but if the state agrees not to seed with these fall games, then those pitchers can sit our or play their other positions. It seems like a way to get on the field and get the full complement of games whereas I don't believe 2021 HS baseball will get a full season any other way.
Just an idea for discussion among a very smart group of baseball minds. Any ideas would be appreciated.