Trophies are collectibles that relate to your current progress in Baseball Clash. Collect them and unlock new leagues with different players and rewards.
If you just started playing Baseball Clash you might have noticed that each time you win or lose a game, changes are applied to your trophy count. On average, you will win more trophies than you will lose.
When you achieve a certain threshold of trophies you will unlock prizes along the trophy lane. After a while new leagues will become available and different players cards will be available on chests.
A trophy reset mechanic exists for players on the highest League (currently League 10) (link). At the end of the season, half of the trophies exceeding the standard trophy score, will be reduced and converted to gold.