Who must conform to height, width, and webbing specifications for gloves and mitts?

The correct response identifies that all players except the catcher must conform to height, width, and webbing specifications for gloves and mitts. This is established by the official rules of baseball, which allow catchers to use mitts that can vary from standard glove specifications. The catcher’s mitt is designed specifically to accommodate their unique role on the field, which involves handling pitches and protecting their hands from fast throws.

This exception is crucial for the performance and safety of the catcher, allowing them to effectively and safely catch high-velocity pitches. On the other hand, all other players must adhere to the specified dimensions and characteristics of gloves to maintain fairness and consistency in the game. This regulation ensures that each player's equipment meets standardized performance criteria, thus supporting the integrity of the sport.