MLB tryouts are usually slated to start at 9:00 AM, but hopefuls are asked to show up a half hour early.When you get to the park, the first order of business is completing a registration card.You??ll find a number on this card, based on your position; for example, stanley steemer catchers might be numbered 101, 102, 103, etc.That number is how you will be addressed and identified for the rest of the day.You'll be asked to tryout at only one position, even if you typically pitch as well as play the field.However, stanley steemer the scouts may allow you a shot on the mound later on if you display the potential to generate some big league gas when showing off your arm in the field.Once everyone is registered, it??s time for position players to show the scouts their wheels.The MLB tryout begins!