2020 NFHS BASEBALL RULE CHANGES
‑1‑4: Designated Hitter (DH) can be used in two ways. The DH can be listed as the tenth starter replacing one of the other nine players when it is their turn to bat. The other method is that that any one of the starting defensive players can be their own DH (in effect having two positions) within the confines of the rule requirements.
Rationale: This rule change assists coaches with an alternative to keep their better players in the game to contribute to the offensive output of the team and give another player a chance to participate on defense. In addition, considering the pitch count rules, this change would help pitchers to keep their bat in the game, but can come out of the game defensively to protect their arms from overuse.