Every ballplayer has a special connection with their baseball glove, shaped by all the hard work that goes into it. This includes hours of playing catch, rubbing in oils and creams, and working it with a wooden mallet.
Before you start using a new fielding glove in a game for the first time, you've got to break it in. Playing with a stiff glove will lead to errors and a spot on the bench. Think of your glove like a part of your hand – it needs to feel right and fit comfortably.
Leather gloves, especially those made from kip leather, steerhide, or cowhide, are durable but initially very stiff. This makes them harder to squeeze shut compared to gloves made from synthetic leather, which are often more flexible straight from the shelf.
Breaking in the glove makes the new leather softer and helps form the perfect pocket for catching and making plays. Use it for a few hours every day. The more you use it, the better it'll fit your hand and the better you'll play.