[ManInBlue]

BJ - first OBR is the Official Baseball Rules (those by which MLB plays). These rules do differ slightly on some subjects from FED (National Federation/high School) and NCAA.

On the BOO - the proper batter should be called out, if the defense appeals the BOO prior to the first pitch to the next batter (or prior to any play). Once that first pitch is thrown, the wrong batter has become legal. And yes that means skip Hill in this case until his next time at bat. Since Overby batted then Hill got a hit - Hill is out of turn - Zaun follows Overby. Overby's at bat was legalized by the first pitch to Hill. Thus whoever follows Overby (Zaun) is the correct batter. Zaun should have been called out (for BOO) and whoever followed him in the order should have batted next (Hill removed from 2B obviously).

Once the Illegal actions are made legal, then the numerical sequence no longer matters - it matters only who follows the actual batter. When the appeal is made is the key to this rule, and understanding it.