I thought it would be fun to use the dnScoop tool to get valuations for 50 sports social networks and community sites. I ran 72 sites through the tool, which values sites based on domain age, PageRank, inbound links, Alexa Rank, and Link Value. It doesn't include two key factors that are usually used to value sites like this - monthly revenue and number of members - not to mention countless other factors that affect a site's valuation.
It's important to remember that this is in no way meant to be an accurate picture of a site's value; this is just one benchmark and it's not really accurate. In fact, most of these values are really low/off. For example at the end of 2006, FanNation was valued at approximately $60 million, but dnScoop says it's only worth $11.9 million.
Here are the top 50 sports social networking websites and communities according to dnScoop. This only includes sites that are hosted on their own domain, since the tool values sites based on entire domains. Some of these may not be true social networks (ex: Deadspin) and I could have probably been more thorough with the categories. Remember this is just for fun. Feel free to comments about what you think, but please refrain from trying to start nasty arguments about the valuations--I know they're not accurate.