Hitting requires an athlete to hinge and load their rear leg. Pitching requires a slight hinge and load in their rear leg prior to delivery. Defensive players need to be able to get into an athletic position to move efficiently and decisively to a ground or fly ball. RDL your athletes!
Hip thrusts are my go-to exercise for minor league baseball players to improve strength and acceleration. Here's a typical progression I use for my players. And no, we don't load this movement at the start.