Polymarket Promo Code: Get $20 in Trading Credits for Monday’s MLB Slate
New Polymarket users can deposit $10 and get $20 in trading credits ahead of a loaded Monday MLB slate, including Guardians-Angels and Phillies-Mariners.
Polymarket is putting new traders in position to profit from Monday’s MLB slate before the first pitch is even thrown. New users who sign up with an invite code can deposit $10 and receive $20 in trading credits, effectively doubling their starting capital to put toward tonight’s games, including a pair of contests carrying real playoff and pricing intrigue: Cleveland Guardians at Los Angeles Angels and Philadelphia Phillies at Seattle Mariners.
| Welcome Offer | Deposit $10, get $20 in trading credits |
|---|---|
| Qualifying Requirement | Enter a promo/invite code during registration, complete identity verification, and deposit a minimum of $10 |
| Bonus Distribution | $20 in trading credits applied automatically after the qualifying deposit is confirmed |
| Minimum Age | 18+ |
How the Polymarket Welcome Offer Works
Claiming the bonus starts with downloading the Polymarket US app from the Apple App Store or Google Play Store. During registration, users are prompted to enter an invite code — this step has to happen before the sign-up process is completed, or the bonus will not apply. From there, new users complete identity verification, providing their full name, date of birth, address, phone number, and a government-issued ID.
Once identity is verified, funding the account with a minimum $10 deposit in USDC or another supported cryptocurrency triggers the offer. The $20 in trading credits lands automatically once that deposit is confirmed, and traders can immediately put the credits to work across Polymarket’s markets. It’s worth noting the credits themselves aren’t directly withdrawable as cash — but any profits generated by trading with them are fully withdrawable, so the bonus functions as extra capital rather than a straight cash grant. The offer is limited to new users only, and it isn’t available in Arizona, Illinois, Massachusetts, Maryland, Michigan, Montana, New Jersey, Nevada, or Ohio, with additional restrictions possibly applying in Tennessee and Connecticut.
Monday’s MLB Slate: Where the Value Is
Cleveland heads to Anaheim on Monday night carrying a 65-66 record and clinging to postseason relevance, while the Angels sit at 52-79 and have long since shifted into evaluation mode for the rest of the season. Sportsbook markets have Cleveland as a solid favorite at -156 to -166 depending on the book, with Los Angeles getting plus money in the +135 to +148 range. Parker Messick gets the ball for Cleveland against George Klassen for the Angels, and while the win-probability gap (roughly 55-45 in Cleveland’s favor per public models) reflects the roster disparity, the Angels have been live dogs against contenders all summer — exactly the kind of price discrepancy that makes a peer-to-peer market like Polymarket interesting, since it’s other traders setting the line rather than a house adjusting for its own liability.
The same dynamic shows up in Philadelphia’s trip to Seattle. The Phillies (73-58) are favored over the Mariners (62-69) by the slimmest of margins — moneyline prices have hovered between -115 and -123 for Philadelphia, with Seattle sitting near even money. Zack Wheeler (10-4, 2.92 ERA) starts for the Phillies against Logan Gilbert (10-7, 3.35 ERA) for Seattle, a legitimate front-of-rotation matchup, and the total sits at 6.5 runs. Despite Philadelphia’s better record, at least one model has actually given Seattle a slight edge to win outright, underscoring just how tightly priced this one is heading into the 9:40 p.m. ET first pitch at T-Mobile Park.
That’s the appeal of trading these outcomes on Polymarket rather than just betting a fixed line: prices move continuously as traders react to lineup news, weather, and bullpen usage throughout the day, rather than being locked in at a single number set by a book.
Why This Offer Stands Out
Polymarket’s return to the US market has made it one of the most closely watched prediction platforms available, and the $10-to-$20 structure is a low-risk way to test that market on a night with multiple close, well-priced games on the board. Traders exploring the platform for the first time can review the full Polymarket review or compare it against other platforms via the best prediction market apps guide before funding an account. For those wondering how the mechanics differ from a traditional sportsbook, the prediction markets vs. sports betting breakdown is a useful starting point, and first-timers can walk through the signup flow with the how to get started guide.
Other Game Picks
Traders who want a side-by-side look at Polymarket against its closest competitor can also check the Kalshi vs. Polymarket comparison, and anyone curious about the cost of trading before committing funds should review prediction market fees. With a full MLB slate on the board Monday night, from a coin-flip Phillies-Mariners pitching duel to a Guardians-Angels line shaped by two very different seasons, there’s no shortage of markets to put that $20 in credits toward.