Here's a really simple, quick card to make in a very few minutes. I can see this card going to a little boy about 8 or 9 years old, who made the team.
Baseball glove - Cornish Heritage Farms ST-5003EUM Athletic Hands (before CHF was sold)
Baseball player - Stampington & Co. M4627 Small Batter
Baseball diamond - free/royalty free graphic from the internet
Letters - Colorbok Ornate Alpha Stax