Most probably haven't heard of the proposal for a "Golden At-Bat," but the basic concept is that a team could choose one at-bat in every game to use its best hitter regardless of where they are in the lineup. So if, say the New York Yankees had the bases loaded and two outs in the bottom of the ninth, they could bring Aaron Judge to the plate even if it wasn't his turn in the order. It would be a one-time replacement, not a substitution like a pinch hitter. -Phillips