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Polymarket promo code SPORTSLINE: Get $20 bonus for Mets vs. Marlins, Giants vs. Padres, MLB on Thursday

New Polymarket users can get a $20 bonus on Thursday after depositing $10 or more to trade

ByPublished: Jul 30, 2026 3:51PM UTC . 4 min read
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The latest Polymarket promo code SPORTSLINE gives new users a $20 trading bonus after depositing $10. The MLB trade deadline is just around the corner, which means a big performance on Thursday could be the difference between teams making a move or staying put. There are 10 games on the diamond, while basketball fans can take in three WNBA contests, headlined by the Minnesota Lynx battling the Toronto Tempo. Click here to sign up at Polymarket and get your $20 bonus after depositing $10 with the Polymarket promo code SPORTSLINE:  

Head to the Polymarket promo code review page to see 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 $10 in contracts for the $20 trading bonus to be applied to their account.

After depositing $10 with the Polymarket promo code, new users will be given a $20 trading bonus: 

Thursday trading preview

  • Marlins-Mets more than 6.5 runs (57%)
  • Giants-Padres less than 8.5 runs (52%)
  • Lynx to win vs. Tempo (87%)

After dropping 12 games in a row, the Marlins have found their footing again as they enter a four-game series with the Mets. Miami has won three in a row to stay firmly in the wild card picture, while the Mets are probably going to start making moves to shed salary. The Marlins will send Eury Perez (5-8, 3.56 ERA) to the bump while New York goes with Nolan McLean (7-7, 3.32 ERA). The SportsLine model has these teams topping seven runs in 70.8% of simulations and on Polymarket, that trade comes in at 57%.

Robbie Ray (9-6, 3.16 ERA) is one of the big trade targets at this year's deadline, and the Giants starter is coming off six scoreless innings in his last appearance ahead of Thursday's game against the Padres. San Diego, which has won five games in a row, will try to gain more ground in the wild card race as it sends JP Sears (3-3, 3.86 ERA) to the bump. These teams score fewer than 8.5 runs in 63.4% of simulations. On Polymarket, that trade is priced at 52%.

Napheesa Collier is back for the Minnesota Lynx, who have won eight games in a row heading into Thursday's matchup with the Tempo. Toronto has dropped its last four games, with the most recent setback being a 100-93 loss to Minnesota. The Lynx are priced at 87% to win this game on Thursday. Trade on Thursday's MLB and WNBA games 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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Chinmay Vaidya
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