When using Underdog Fantasy you can choose from a selection of bets to apply your fantasy sports picks too. We’ve written a guide here at GamblingGuy to give you an in-depth insight into this daily fantasy sports app and website. Underdog offers a unique $3 Best Ball option, which we feel will prove very popular. Their snake drafts options are also varied too. What’s more is there are currently Underdog Fantasy Sign Up Offers of 100% deposit match, up to $100.