The best way to break in a new baseball glove is to play catch with it repeatedly , then shape the pocket and hinge points by hand or with a mallet. A small amount of glove conditioner can help, but avoid soaking it, overheating it, or using gimmicky “speed-up” methods that can damage the leather.

What works best

  • Play catch often, because that forms the glove to your hand and the way you actually catch the ball.
  • Work the hinge points near the heel so the glove opens and closes more naturally.
  • Use a glove mallet or your hands to shape the pocket where you want the ball to sit.
  • Apply only a light amount of conditioner if needed; too much can make the glove heavy or overly soft.

What to avoid

  • Don’t use an oven, microwave, or high heat, since that can damage the leather and finishes.
  • Don’t drench the glove in oil or conditioner.
  • Don’t force a deep break-in all at once; gradual shaping usually lasts longer and feels better in games.

Simple routine

  1. Put a baseball in the pocket and close the glove around it.
  1. Secure it loosely with bands or a wrap for a short time if you want the pocket to hold shape.
  1. Flex the heel and thumb/pinky areas by hand.
  1. Use a mallet on the pocket and stiff points.
  1. Finish by playing catch until the glove opens and closes the way you like.

Best practical answer

If you want one method, choose this: light conditioning, hand shaping, mallet work on the stiff spots, and lots of catch. That is the most durable, game-ready approach in the sources I found.

TL;DR

The fastest safe way is not a trick — it’s steady use, careful shaping, and a little conditioner only if needed.