If you're a sports fan, owning your baseball jersey is essential. It is more then really showing support for your preferred team; it is also a way to show their personality and passion for the that the game. Here are 5 reasons why any sports fan needs your baseball jersey.In that the 1990s, teams began trying out alternate jerseys and colors. The Oakland A's even tried wearing white cleats and socks, which were banned by MLB. Through the early 2000s, sleeveless jerseys and also throwback designs were extremely popular.