Instead of having to do the in-season management of traditional fantasy leagues, you simply draft your team and never touch it again. By entering that code, you’ll receive the exclusive Spike Week deposit bonus worth up to $100.īest Ball is the newest craze in fantasy sports. Most importantly, make sure to put the promo code SPIKE into the promo code box at the bottom of sign up. From there, you just have to choose a username and enter your email, password and date of birth. Getting started on Underdog is super easy! Simply head over to and click “Sign Up”.
