3.17
Players and substitutes of both teams shall confine themselves to their teams benches unless actually participating in the play or preparing to enter the game, or coaching at first or third base. No one except players, substitutes, managers, coaches, trainers and bat boys shall occupy a bench during a game.
PENALTY: For violation the umpire may, after warning, remove the offender from the field.
Rule 3.17 Comment: Players on the disabled list are permitted to participate in pre-game activity and sit on the bench during a game but may not take part in any activity during the game such as warming up a pitcher, bench-jockeying, etc. Disabled players are not allowed to enter the playing surface at any time or for any purpose during the game.