FantasyBoss is a season long fantasy sports platform where you can create, join, & play in fantasy sports leagues for free. Join us for Fantasy Football, Basketball, Hockey, & March Madness. FantasyBoss is designed to be more fun and less work. Weve all used the same platforms for years, but now its time for something better. Built by fantasy players for fantasy players. We know you’re a BOSS and will treat you like one.