Eligible new users can claim the Polymarket sign up bonus ACTION before first pitch. Deposit at least $10 and receive a $50 trading bonus that can be used across available MLB contracts, including any options from Guardians vs. Red Sox.
Cleveland enters Wednesday with a lead over the White Sox in the AL Central and six games left to protect it. Three of those come at Fenway Park, starting with a 7:10 p.m. ET matchup against Boston. Sign up with the Polymarket sign up bonus ACTION today, and make your first trade on any Polymarket MLB odds.
Polymarket Sign Up Bonus ACTION Full Offer Details
| Detail | Value |
|---|---|
| New Player Offer | Deposit $10, Get a $50 Trading Bonus! |
| Promo Code | ACTION |
| Offer Type | Deposit bonus |
| Minimum to Qualify | $10 |
| Reward | $50 trading bonus |
| Available States | AK, AL, AR, CA, CO, CT, DC, DE, FL, GA, HI, IA, ID, IN, KS, KY, LA, ME, MN, MO, MS, NC, ND, NE, NH, NJ, NM, NY, OK, OR, PA, RI, SC, SD, TN, TX, UT, VA, VT, WI, WV, WY |
| Platform | Polymarket |
| Last Verified | September 23, 2026 |
The Polymarket sign up bonus ACTION does not require a qualifying opening trade on a prediction market. Register through the prediction market promo, complete a first deposit of at least $10 and eligible new users receive the $50 trading bonus.
That gives traders time to compare Guardians vs. Red Sox with other available contracts instead of forcing a position immediately after signup on the prediction market app.
Guardians vs. Red Sox: Game Preview
- When: Wednesday, September 23, 2026, 7:10 p.m. ET
- Where: Fenway Park, Boston
- TV: ESPN
Cleveland enters the final six games of the regular season with a one-game AL Central lead over Chicago. Three games at Fenway are followed by a three-game set in Kansas City, leaving little room for the Guardians to give away results down the stretch.
Boston is in a different position. The Red Sox have already secured a postseason berth, removing some of the pressure Cleveland carries into Wednesday, although Boston can still use the final week to prepare for October and improve its positioning.
Sonny Gray starts for the Red Sox with a 2.82 ERA, while Foster Griffin counters for Cleveland at 3.67.
That pitching matchup is the biggest reason not to reduce this game to motivation. Cleveland may need the result more, but Gray gives Boston a legitimate advantage on the mound at Fenway.
How Polymarket Prices Guardians vs. Red Sox
Polymarket uses event contracts rather than traditional sportsbook odds.
Contracts generally trade between 1¢ and 99¢ and settle at $1 if the selected outcome occurs or $0 if it does not.
A team trading at 55¢ carries roughly a 55% market-implied probability at that moment. Spending $100 at that price would return approximately $182 if the contract settles at $1.
A 45¢ contract carries a lower implied probability but offers a larger potential return, with a $100 position returning approximately $222 if successful.
Those prices are set by traders buying and selling against each other and can continue moving before first pitch.
Guardians vs. Red Sox Prediction and Pick
- Guardians vs. Red Sox prediction: Guardians to win
Cleveland's urgency to make the postseason matters, but it is not the only reason to prefer the road side.
Griffin has pitched well enough to keep the Guardians competitive, and Cleveland needs every remaining win while protecting a narrow division lead. That should keep the full roster engaged throughout the series.
Boston owns the starting-pitching edge with Gray, which makes the price important. The Red Sox should not be faded automatically just because their postseason berth is already secure.
How to Claim the Polymarket Sign Up Bonus ACTION
- Click the Polymarket sign up bonus ACTION link and create a new account.
- Enter ACTION in the referral-code field if it does not populate automatically.
- Complete Polymarket's identity verification.
- Deposit at least $10 using a supported payment method.
- Receive the $50 trading bonus.
- Browse Guardians vs. Red Sox or another available market and check the live contract prices before entering a position.
Polymarket Refer-a-Friend Program
The welcome offer is only the first available incentive.
Existing users can also earn $25 in trading credit for each qualifying friend who signs up through their invite link or username, completes identity verification and meets the required deposit conditions.
The current program allows up to 14 successful referrals, creating a maximum of $350 in additional trading credit.
Qualifying referred users also receive $25 in credit after completing the requirements.
Polymarket Sign Up Bonus ACTION: Final Thoughts
The Polymarket sign up bonus ACTION gives eligible new users $50 in trading credit after a $10 deposit.
Guardians vs. Red Sox also gives traders a matchup with real late-season stakes. Cleveland enters with the AL Central still in play, while Boston counters with Gray and the freedom of already having secured a postseason berth.
Polymarket Terms and Conditions
18+ Only. Restrictions and eligibility requirements apply. Not available in all jurisdictions. Trading is risky. 100% loss can occur. See polymarket.com/tos for more information. The Polymarket US App serves as an independent software provider and affiliate of Polymarket US and Polymarket Clearing, the CFTC-regulated exchange and clearing organization.
