In short yes, and it will be gratefully accepted.
We had a family stay at Casa Caracol last year who raised US$1,500 from a sponsored walk and then went out and bought a ton of good used kids Softball/Baseball kit they then donated. It was distributed and it's use administered through the San Pedro Business Association, and helped start up a kids League. You can contact them to see if they need any of that kit topped up, or if they are looking at any other new sports projects. Otherwise try contacting Pablo Ico on the Sports Council at the San Pedro Town Board. Not sure either would appreciate their contact details on a public forum so PM me for email details if needed.
Shirts aren't such a problem for the sports as the kids can wear anything coordinated or bought locally, but specific kit, shoes, safety gear, bats, balls etc are the way to go.