Play $5 Get $50 Bonus on Blue Jays vs Red Sox MLB: Use Underdog Code BTSLINES

Written By John Carlo Villaruel | Published at June 16, 2026
Play $5 Get $50 Bonus on Blue Jays vs Red Sox MLB Use Underdog Code BTSLINES

How would you like to get your hands on a $50 DFS bonus for this week’s huge MLB clash between the Toronto Blue Jays and the Boston Red Sox? That’s exactly what’s on offer if you sign up at Underdog today using our exclusive BTSLINES bonus code and play at least $5 on any upcoming DFS contest. Read on to discover how to collect this world class bonus and use it on Thursday’s Blue Jays-Red Sox showdown.

Please note: This DFS new player bonus is currently available in 46 US states. The only four states excluded from the offer are MD, NJ, OH and PA.

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Must be 18+ (19+ in AL, NE; 19+ in CO for some games; 21+ in AZ, MA, and VA) and present in a state where Underdog Fantasy operates. Terms apply. Concerned with your play? Call 1-800-MY-RESET or 1-800-GAMBLER or visit www.ncpgambling.org. NY: Call the 24/7 HOPEline at 1-877-8-HOPENY or Text HOPENY (467369)

How to Collect Your Underdog New Player Bonus

To open your Underdog account and receive your $50 bonus, just click the banners on this page, then follow these simple steps:

  1. Click the Sign Up button to register on the Underdog website. Alternatively, use the links on the homepage to download the Underdog mobile app from the Apple App Store or Google Play Store, then complete your registration on the app.
  2. When you fill out the short registration form, make sure you enter our exclusive BTSLINES code into the promo code text box.
  3. After completing your registration, head over to your account page and add at least $5 to your balance.
  4. Go to the baseball section of the Underdog website and play $5 or more on any upcoming MLB DFS contest.
  5. Once your DFS entry has settled, Underdog will automatically add a $50 freeplay bonus to your account. This bonus can be used on any upcoming MLB matchup, including Thursday’s contest between the Blue Jays and Red Sox.

Blue Jays vs Red Sox: How to Enter DFS Contests at Underdog

To play your $50 on the Blue Jays-Red Sox matchup, you need to put together a squad containing between two and eight players. Each player in your squad will have a projected stat attached to them, and you need to predict whether each player’s actual stat line will be higher or lower than their projected total. If you decide to enter a Standard Underdog DFS contest, you will need to get all of your picks right to win a prize. However, you can opt to enter a Flex event, which gives you a payout even if one of your predictions is incorrect.