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Polymarket promo code SPORTSLINE: Get $50 bonus for Dodgers-Phillies, Pirates-Yankees, MLB on Tuesday

New Polymarket users can get a $50 bonus Tuesday's when they deposit $20 and trade on the day's sports action

ByPublished: Jul 21, 2026 2:24PM UTC . 3 min read
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New Polymarket users can trade on baseball and plenty of other sports with the latest Polymarket promo code SPORTSLINE, which gives newcomers a $50 trading bonus when they deposit $20 to make trades. Highlights of Tuesday's slate include Dodgers vs. Phillies, Yankees vs. Pirates and Cubs vs. Tigers. Click here to get started and claim your $50 bonus after depositing $20 with the Polymarket promo code SPORTSLINE: 

Visit the Polymarket promo code review page for the terms and conditions of this offer.

How to sign up for the Polymarket referral code SPORTSLINE

You can sign up for this Polymarket offer using the steps listed below. This offer is only available for new users.

  1. Click CLAIM BONUS on this page. Download the Polymarket app.
  2. Create an account and provide all the required information, such as name, email and payment details. Use the code SPORTSLINE to get your bonus.
  3. Make a first deposit by your preferred deposit method and follow the prompts.
  4. New users must deposit at least $20 in contracts for the $50 trading bonus to be applied to their account.

After depositing $20 with the Polymarket promo code, new users will be given a $50 trading bonus: 

Tuesday, July 21 trading preview

  • Dodgers to win vs. Phillies (45%)
  • Reds vs. Mariners more than 7.5 runs (49%)

Rain could delay the marquee Dodgers-Phillies matchup or postpone it entirely, but let's hope the game is played as this could be a great one. Ace Zack Wheeler (10-1, 2.13 ERA) gets the ball for Philly while the surprising Justin Wrobleski (10-2, 2.69) goes for Los Angeles. The SportsLine Projection Model, which simulates every game 10,000 times, has the Dodgers winning in 56% of its outcomes. That makes backing the Dodgers to win on Polymarket a potentially valuable move.

Another ace will be working on Tuesday as the Cincinnati Reds will start Chase Burns (11-1, 2.54) in Seattle against the Mariners. Seattle will give the ball to former Red Luis Castillo (3-8, 4.93). Castillo's struggles are part of why the SportsLine model has more than 7.5 runs being scored in 62.6% of its simulations, making that outcome an attractive trade on Polymarket. Trade on MLB and more with the Polymarket promo code SPORTSLINE:

Responsible Risk Management

Polymarket offers different ways to keep its users safe with risk management tools like trading breaks, a voluntary opt-out feature and funding limits.  

Prediction Markets are regulated by the Commodity Futures Trading Commission (CFTC) - an independent agency of the U.S. federal government.

Event contracts trading involves a risk of substantial loss and is not suitable for all investors. Participation in prediction markets is subject to applicable eligibility requirements. Participation may be restricted or prohibited in certain jurisdictions and participants are responsible for ensuring their participation complies with applicable laws and regulations in their jurisdiction.

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Nick Stellini
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