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Polymarket promo code SPORTSLINE: Get $20 bonus for Guardians-White Sox, MLB predictions on Saturday
New Polymarket users can get a $20 bonus on Saturday after depositing $10 or more to make trades

Saturday features 15 MLB games, three WNBA contests and the third round of the PGA Tour's Wyndham Championship, and sports fans can claim the Polymarket promo code SPORTSLINE, which gives new users a $20 bonus when they deposit $10 or more. The Guardians and White Sox meet in a key AL Central battle, while the Rays visit the Mariners in Seattle. Click here to get started at Polymarket and claim your $20 bonus after depositing $10 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 Polymarket, one of the top prediction market sites, using the steps listed below. This offer is only available for new users.
- Click CLAIM BONUS on this page. Download the Polymarket app.
- Create an account and provide all the required information, such as name, email and payment details. Use the code SPORTSLINE to get your bonus.
- Make a first deposit by your preferred deposit method and follow the prompts.
- 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:
Saturday trading preview
- White Sox to beat Guardians (46%)
- Mariners to beat Rays (52%)
The White Sox are in control of the AL Central, but you know the Guardians are going to be fighting to win the division for the third year in a row and fourth time in five seasons. The Guardians can lock up a series win on Saturday after winning the series opener on Friday. Lefty Anthony Kay (8-5, 4.01 ERA) will start for Chicago while Cleveland hands the ball to Gavin Williams (11-6, 3.56 ERA). The SportsLine Projection Model, which simulates every MLB game 10,000 times, has the White Sox winning in 56% of simulations, a result that's priced at 46% at Polymarket.
It feels like we've been waiting for the Mariners to get on a roll after making the ALCS last year, but that's yet to happen. They're facing a tough Rays team this weekend that sits atop the AL East standings and is trying to fend off the Yankees as well as the red-hot Red Sox. Tampa Bay took Friday's series opener 2-1 and will be trying to secure a series win on Saturday. Griffin Jax (6-9, 3.63 ERA) starts for the Rays while George Kirby (8-9, 3.76 ERA) will start for the Mariners. The model has the Mariners winning 53% of the time, which is trading at 52% at Polymarket. Trade on Saturday's MLB action and more with the Polymarket promo code SPORTSLINE:
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Written by Brandon Gustafson
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