You're not tired

You're not tired in baseball unless you are pitching or catching. Tired is a mental excuse to justify failure. You have to focus for less than a second at a time from the moment the pitcher throws the ball until the hitter hits it or the catcher catches it. Playing in the present is the hardest thing to do in baseball but it is vital to getting a good jump, seeing the ball well and executing. You need to stay relaxed during that time the ball is in the air so your actions can be quick and explosive when its time to go. Everything in baseball is relaxed/slow to quick. If you 1. develop the quick twitch muscles in your body 2.learn how to relax 3.learn how to deal with failure 4. consistently work on your game you will be great.