When you take ‘Action’ on an MLB match it means that you are wagering on a squad to win a match regardless of whatever player takes the stand. So if you take moneyline action on the Braves with Max Fried listed as the pitcher, but when it comes to the game Kenley Jansen takes to the mound, your bet will still stand. The opposite of ‘action’ bets is limited bets. With limited bets, if there is a change to the listed pitcher then your bet would be canceled and your stakes returned.