If you think the first base umpire made a bad call, press Y during the replay to argue it. Doing this sends out your manager. It will show your manager walk out of the dugout. A bar will apear near the bottom of the screen that indicates argument intensity. Keep pressing Y as fast as you can to make a real strong argument. However, you will be ejected and the CPU will make all managerial decisions from now on. If you want to argue without being ejected, press Y only a few of times, so that about a one quarter or half of the argument intensity bar is filled.