Every once in a while a team will decide to try something new, something different, or maybe something they've done before.
And that something is the team uniform.
On special occasions, or sometimes as an alternate jersey, sports teams will don replicas of old uniforms worn before the time of the current team. These jerseys are known as throwback jerseys, and almost every team in the NFL, NBA, NHL and MLB has brought back an old look for one game or an entire season.
These jerseys range from awful looks that should have been left forgotten to awesome looks paying homage to their teams' earlier years.
Here is a list of 30 of the best throwback jerseys.