Boys can often sacrifice their bodies, especially during competitions. They are willing to pay any price to win.
So even though it hurts and is uncomfortable, he will be very happy as long as he wins the game. However, you should still take good care of him. As a wounded person, you still need to take good care of your wounds.
Giving him a small gift is not bad. It seems that you are a person who cares about others. You can customize a real doll to look like him in the competition. The heroic look will make your brother happier and prouder.
You can give him a letter chain with his name on it to bring him good luck. There are many other gifts. I hope you like them and they can help you.