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Polymarket promo code SPORTSLINE: Get $20 bonus for Reds-Guardians, Braves-Mets, MLB on Monday

New Polymarket users can get a $20 bonus on Monday when they deposit $10 and trade on the day's sports action

ByPublished: Jul 27, 2026 8:24PM UTC . 4 min read
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With a new week in MLB starting today, there is a 12-game lineup featured tonight, which means it's a great time to take advantage of the Polymarket promo code SPORTSLINE, which gives new users a $20 bonus when they deposit $10 to make trades. The Reds and Guardians headline tonight's action in a primetime, in-state clash that will be nationally televised. Meanwhile, the Braves and Mets meet in an intense National League East matchup where Atlanta has a steady 5.5-game lead in the standings. Click here to get started and claim your $20 bonus after depositing $10 with the Polymarket promo code SPORTSLINE:

For the terms and conditions of this offer, be sure to check out the Polymarket promo code review page.

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: 

Monday MLB trading preview

The Guardians visit the Reds tonight, and Cincinnati enters this matchup playing strong as it has three straight series wins. This evening's game does feature a pitching mismatch as Reds' star rookie pitcher Chase Burns boasts a 12-1 record on the season. Burns is also tied for the lead among all MLB pitchers going into tonight. The Reds are trading at $0.60 per share to win, and the Guardians are at $0.41. Users can also trade on strikeouts at Polymarket, and Chase Burns is priced at $0.77 per share to have five or more strikeouts.

In a key National League East showdown, the Braves and Mets are battling in a three-game series tonight. Ronald Acuna Jr. is expected to return to Atlanta's lineup, and New York is looking to sell off next week ahead of the trade deadline as they are in the bottom of their division. Although this is a game between first and last, the Braves are priced at $0.50 per share to win tonight on Polymarket and the Mets are also at $0.50. New York is 4-3 this season against Atlanta in the series, and Zac Thornton, starting tonight, enters with a 1.93 ERA. 

The first-place Milwaukee Brewers are on a West Coast trip, and tonight they will be in San Francisco to face the Giants. Although the Giants are near the bottom of their tough National League West division, these two teams split their four-game series in Milwaukee last month. San Francisco's starter tonight, Tyler Mahle, has a strong 2.00 ERA at Oracle Park this season. He is trading at $0.85 to have at least 3 strikeouts this evening. On the Milwaukee side, veteran leader Christian Yelich, priced at $0.10 to hit a homer, has historically played well here with 8 career home runs. The Brewers look to take advantage of this matchup to chase down the No. 1 overall seed in the National League last year. Trade on the 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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Janine Brown
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