A sports jersey is read as loyalty to a team and a shared identity worn openly. Dream books link it to belonging, competition, and the number or name you are known by.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.