Underdog Promo Code FOXSPORTS: Play $5, Get $100 on 49ers vs. Commanders, Guardians vs. Rays ALCS Showdown

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Monday brings a double dose of postseason and primetime action and Underdog has you covered, with the Tampa Bay Rays looking to clinch a spot in the World Series and the San Francisco 49ers aiming to stay undefeated on Monday Night Football. New users can use the promo code FOXSPORTS to play $10 and get $50 in bonus entries, giving fans a chance to get involved with the day’s biggest matchups.

The Rays have a 3-2 lead over the Cleveland Guardians after taking Game 5 by a 3-1 score. Drew Rasmussen delivered seven strong innings, allowing just one run as Tampa Bay moved within one win of the World Series. 

Meanwhile, the 49ers bring a perfect 5-0 record into their matchup with the Washington Commanders, who are looking to bounce back from a frustrating overtime tie against the New York Giants. Brock Purdy and San Francisco will try to extend their winning streak, while Washington looks to pull off a road upset.

Ready to get in on the action? New users can enter Underdog’s promo code FOXSPORTS, play $10 and get $50 in bonus entries to use on eligible contests while following  these two showdowns.

How to Sign Up and Claim the Underdog Promo Code

1. Click “Claim Now” or visit the Underdog site and use promo code FOXSPORTS
2. Download the Underdog app (iOS or Android) and complete registration (name, email, date of birth, address, last 4 of SSN if required) and account verification.
3. Once your account is verified and you play $5, you will receive $10 in bonus bets.
4. Repeat this process each day for 10 days to earn $100.
5. Any winnings from bonus-fund entries become withdrawable once play-through or contest requirements are satisfied.
6. For more information, visit our Underdog promo code page.

How To Watch Rays vs. Guardians Game 6

• When: Monday, October 19, 2026 at 8:08 p.m. ET
• Where: Tropicana Field, St. Petersburg, FL
• TV: TBS

How to Watch 49ers vs. Commanders

• When: Monday, October 19, 2026 at 8:15 p.m. ET
• Where: Levi’s Stadium, Santa Clara, CA
• TV: ABC, ESPN
• Stream: ESPN Unlimited – Get the FOX One / ESPN Bundle