If you use the Polymarket promo code MILE when you sign up, new customers can get a $20 bonus after making an initial deposit of at least $10. Register here to activate this welcome offer for MLB matchups this week.

 

Polymarket Promo Code MILE Activates $20 Bonus

Polymarket Promo Code MILE
New User Offer $50 Bonus
Terms and Conditions 18+ and Present in the US
Date Last Verified August 24, 2026

As long as you are a new Polymarket customer, you can unlock a $20 sign-up bonus to use on today’s massive baseball slate. The process is simple: just create your account, enter the promo code MILE, and make an initial deposit of at least $10. Once you do, that $20 bonus is yours to play with.

We can use this extra capital to back the surging Philadelphia Phillies, who are riding a nine-game winning streak into Seattle, or take a shot on the 75-win Chicago Cubs out in the desert.

Keep in mind that a few standard regulatory requirements apply. This promotion is strictly reserved for new Polymarket customers, so existing users aren’t eligible for this specific bankroll boost. You must also be 18 or older and physically located in an eligible Polymarket state to claim your reward.

MLB Games and Probabilities Today

Here are the latest moneyline odds and vig-free probabilities for today’s biggest matchups:

Matchup Moneyline
TB @ DET TB -136 / DET +123
PHI @ SEA PHI -114 / SEA -103
CHC @ ARI CHC -141 / ARI +121
PIT @ SD PIT -109 / SD -107
CIN @ SF CIN -160 / SF +137

If we want to maximize a quick $20 trade on the moneyline today, targeting the extremes gives us a couple of clear options. Backing Monday’s heaviest favorite, the Cincinnati Reds (-160), yields a modest but reliable $12.50 profit. On the flip side, if we want to chase a nicer pay day, placing that same $20 on the heaviest underdog, the San Francisco Giants (+137), nets a $27.40 profit if they can pull off the upset.

When I’m handicapping these lines, I always look for statistical edges. The Chicago Cubs easily justify their status as road favorites (-141) with clear advantages at the plate and on the mound. Chicago boasts a .762 team OPS compared to Arizona’s .719, and the Cubs’ pitching staff holds a solid 4.124 ERA against the D-backs’ 4.187 mark. Plus, they are handing the ball to Kevin Gausman right after hanging 19 runs on the Mariners.

Meanwhile, the Philadelphia Phillies (-114) are an incredibly strong play. They are bringing a nine-game win streak into Seattle, giving the ball to Zack Wheeler to face a Mariners squad reeling from historic blowout losses. That is exactly the kind of momentum I love to back.

How to Use the Polymarket Promo Code

If you are ready to put your baseball knowledge to the test and capitalize on today’s MLB slate, claiming your welcome offer is incredibly straightforward. I’m taking advantage of these lines today, and here is how you can get set up to join the action:

  1. Register Your Account: Create a new account here by entering your standard personal information.
  2. Verify Your Identity: Submit the necessary proof of identification to secure and verify your account.
  3. Apply the Code: Make sure you enter the Polymarket promo code MILE during the registration process. This is the key to locking in your offer.
  4. Fund Your Account: Make a first-time deposit of at least $10. This officially activates the promotion, instantly unlocking your $20 bonus so we can start trading on today’s games.