Today the Baltimore Orioles played a home game against the New York Mets. For the “Star Spangled Banner,” Dan Deacon used his electronic flair to make his performance unique.

To fans, a jersey number is just a way to identify players on the court, but to the athlete, it’s much more than that.

Fleming was also unable to wear a previous number because of a jersey retirement. He wore No. 13 throughout college. However, ...