When must F2 wear a mask and head protector while warming up according to the umpire's ruling?

F2, or the catcher, is required to wear a mask and head protector while warming up on the field to ensure their safety. Catchers are consistently exposed to the possibility of foul tips and wild pitches, which can result in serious injury if proper protective gear is not used. The rule mandates that as long as they are warming up, whether before the game, during practice, or even in pre-game warm-ups, F2 must be properly equipped with the protective gear. This practice safeguards the catcher and fosters a safer playing environment, emphasizing the importance of adhering to safety protocols at all times while they are engaged in play on the field.