From player cards to signed bats or jerseys, sports memorabilia NFTs are sold by several platforms. Important sporting moments also go for the big bucks. 

You can also own trading cards which are a huge show of support for your favourite legends. You also have fan tokens which come with benefits like access to events and decisions. 

NFT games, too, are a popular investment. Sports NFTs are bought to play the game after which they can be sold on a secondary NFT sports marketplace for passive income.