You’ve got a guy on first and second with two outs. It’s the fifth inning of a clinching playoff game. Do you go to the pen, or do you play with fire? That guy might be able to help.
In crucial games that can end with one swing of the bat, you can’t worry about who is rested or theorize if a guy is going to make it through the game intact. Baseball is a world obsessed with ace performances and how deep a guy can go into a game, but no matter how good someone is, the worst hitters can go yard against the best pitcher at any time.