Your local boys and girls club could use them. Leftyside Son started a clinic for our local club. Every year he'd gather up used baseball equipment and bring them over to the boys on the day of the clinic. You would have thought it was Christmas in April when he showed up with the boxes and the boys all got to play with their "new" bats. Gloves are also a huge need.
But be mindful...somewhere along the line we donated his first pitching glove. That was a mistake.