Use the Kalshi promo code MILE15 to grab a $15 bonus after making just $10 in trades. I’m placing these predictions myself, and I want to explain exactly how we can both take advantage of this welcome offer ahead of Thursday’s MLB and World Cup games. Start by signing up here and making a few trades to unlock the bonus.
Kalshi Promo Code MILE15 for MLB and World Cup Predictions
Before making our predictions on today’s action—whether we are backing the powerhouse New York Yankees (48-31) or taking a flyer on the hometown Boston Red Sox (32-46) at Fenway Park—we need to make sure we’re geared up with the latest welcome offer.
Here is exactly what you need to know to get started:
| Kalshi Promo Code | MILE15 |
|---|---|
| New User Offer | $15 Bonus |
| Terms and Conditions | 18+ and Present in the US |
| Date Last Verified | June 25, 2026 |
Eligible new customers can claim a $15 bonus, which serves as an excellent introduction to the platform ahead of today’s busy MLB slate. Whether you want to make predictions on the Chicago Cubs taking on the New York Mets at Citi Field or the Arizona Diamondbacks battling the St. Louis Cardinals at Busch Stadium, this welcome offer provides a fantastic bankroll boost for your first foray into Kalshi’s unique prediction markets.
To take advantage of this promotion, you must be at least 18 years old and physically located in any of the 50 U.S. states where Kalshi is available. Simply create a new account and make a first-time deposit of at least $1. Then, place $10 in trades on any of their available prediction markets. After you meet this straightforward trading requirement, your $15 bonus will be ready to use.
MLB Games and Probabilities on Thursday
Now, let’s get to the fun part: handicapping the slate. Before we unlock that bonus, I always review the latest vig-free probabilities to find the most mathematically sound prediction markets. We are keeping it simple and looking strictly at the raw percentages to guide our strategy today:
| Matchup | Probability |
|---|---|
| NYY @ BOS | NYY 58.0% / BOS 42.0% |
| CHC @ NYM | CHC 49.1% / NYM 50.9% |
| ARI @ STL | ARI 45.3% / STL 54.7% |
Here is how I like to break this down. If you use your $10 trading requirement on today’s heaviest favorite, the New York Yankees, a successful trade nets $6.54 in profit. On the flip side, taking a chance on the biggest underdog, the Boston Red Sox, would return a juicy $12.80 in profit on a winning $10 prediction.
When analyzing that premier American League East clash, the Yankees hold a distinct analytical edge. While both clubs share an identical .244 team batting average, New York has produced significantly more offense overall, racking up 400 runs and a .766 OPS compared to Boston’s 307 runs and .697 OPS.
The gap remains noticeable on the mound. The Yankees boast an excellent 3.337 staff ERA across 701.1 innings. Meanwhile, the Red Sox pitching staff carries a higher 3.816 ERA into tonight’s contest at Fenway Park, giving New York the clear advantage on both sides of the ball.
Signing Up with the Kalshi Promo Code
To ensure we’re fully loaded before the first pitch tonight, follow these simple activation steps:
- Create an Account: Register for a new account here by providing standard personal information (such as your name, email address, and date of birth).
- Verify Your Identity: As part of the standard onboarding process, you will need to provide proof of identification to secure your account.
- Enter the Promo Code: When prompted during registration, punch in the promo code MILE15 to lock in the new user offer.
- Make a Deposit: Fund your account by making a first-time deposit of at least $1.
- Start Trading: Make $10 worth of trades on the platform.
Here is my favorite part of this strategy: we don’t have to risk that $10 all at once to qualify. We can break it up however we see fit! Whether that means placing ten separate $1 predictions on the Cubs and Mets or a couple of $5 predictions on the Diamondbacks and Cardinals, it all counts. As long as the sum of your trades equals $10, the requirement will be met.
Once your $10 in cumulative trades is placed, your $15 sign-up bonus will be fully activated, unlocked, and waiting in your account for our next big prediction.
