The Raising Cane's Underdog Challenge Sweepstakes is a promotional event available to residents of select U.S. states. Entrants have a chance to win one of 4,400 promo codes, each redeemable for a free Raising Cane's Box Combo, valued at approximately $10.99. The sweepstakes is open for a single entry until April 8, 2024, and eligibility is restricted to participants 18 years and older from specific states.