I usually chew my glove threads exactly 13 times and I eat exactly 13 seeds and then I swing the bat 13 times on deck plus 13 warm up pitches no more no less. 13 is my lucky number in case you didn't guess.
In 1995, shortstop Dale Brewer Jr. of Sonoma State University kept a cheeseburger in his back pocket as he played. The burger was his good luck charm. Dale became a big believer in burgers one night after skipping dinner in 1995, Feeling hungry at the ballpark, he asked his mom to to run out and get a cheeseburger for him. The game had started when she got back. Dale ate some in the on deck circle, then stuffed it in his pocket for later. He went up to bat and hit a double to the gap. So he kept a burger on his buns the rest of the season.