A "Rally Cap" is a term used in baseball to describe a specific practice where fans and players wear their caps inside out or backward during a game. This is often done in hopes of changing the team's luck, especially when they are trailing or facing a tough opponent. The act symbolizes a rallying cry for the team to perform better and overcome challenges. The tradition of the Rally Cap is popular among many Major League Baseball teams and their supporters. It serves as a fun and superstitious way to engage fans and create a sense of unity during critical moments in a game.