The name reminds me of Fire Pro Wrestling, but Fire Joe Morgan is actually a site whose focus is tearing apart shoddy baseball writing and reporting. The authors are of the sabermetric school of baseball thought (that is, guided by objective statistical analysis), and bristle at constantly being stereotyped by the old guard as stats nerds living in their parents’ basement. Joe Morgan is not their only target, mind you — he just happened to be a convenient way to make a catchy site name.
Even though my love for baseball has waned considerably in the last few years, I still find reading the site hilarious. If you have any inkling about sabermetrics, or just like to read cranky people ripping on stuff, definitely check it out.