When you look good, you play good. At least, that is the cliché that is thrown around in sports circles. How it applies to baseball is really anyone's guess at this point. There are endless alternate jerseys in the minor leagues, promotional partnerships, and various theme nights that get people in the doors. We as fans buy more merchandise, and the players seem to always embrace it -- everybody wins.
Teams take advantage of days like Mother's Day, Father's Day, and Independence Day to add variation to their standard lineup of uniforms. Additionally, MLB's adoption of the City Connect jerseys in recent years, has added a whole new layer to the world of jerseys.