On Friday, July 31, 2026, Polymarket promo code MASS gives eligible new users a $20 trading bonus after a qualifying deposit of at least $10, adding value for Red Sox vs. Dodgers moneylines, run lines, totals and other available MLB markets.
Boston opens a three-game series in Los Angeles after going 3-1 against the Athletics to begin its California road trip. With Monday’s MLB trade deadline approaching, potential roster moves, confirmed lineups, bullpen availability and late trading activity could influence prices before first pitch.
Polymarket recognizes promo code MASS as a verified offer for eligible new U.S. users. Complete the following steps to claim the bonus and begin trading:
Steps to redeem the Polymarket promo code MASS for Red Sox, MLB:
- Visit Polymarket.com or install the mobile app.
- Create an account and use the Polymarket promo code MASS into the referral or invite box.
- Complete the required identity verification process.
- Deposit at least $10 and the $20 bonus will appear instantly.
Eligible users can begin trading once the bonus funds arrive. Funds apply to any active Polymarket prediction market, including sports, the economy and global politics.
Terms: Polymarket promo code MASS
- Offer: $20 trading bonus
- Required deposit: $10
- Code: MASS
- Who qualifies: New Polymarket US accounts only
- Active as of: Late July
- Market access: All active Polymarket prediction markets
Polymarket prices for Friday’s MLB schedule
Friday’s full MLB schedule gives Polymarket traders a wide range of moneyline, run-line and total markets to explore. Boston’s road matchup with Los Angeles stands out among the late games, with the Red Sox drawing stronger support to stay within 1.5 runs than to win outright. Prices reflect each outcome’s approximate implied probability and may shift as confirmed lineups, pitching updates and trade deadline developments emerge.
| Time (ET) | Matchup | Moneyline | Run line | Total |
|---|---|---|---|---|
| 2:20 p.m. | Yankees vs. Cubs | NYY 42¢, CHC 59¢ | NYY +1.5 59¢, CHC -1.5 42¢ | Over 9.5 47¢, Under 9.5 54¢ |
| 6:10 p.m. | Pirates vs. Reds | PIT 55¢, CIN 46¢ | PIT -1.5 43¢, CIN +1.5 59¢ | Over 7.5 54¢, Under 7.5 47¢ |
| 7:05 p.m. | Phillies vs. Orioles | PHI 49¢, BAL 52¢ | PHI -1.5 36¢, BAL +1.5 65¢ | Over 8.5 54¢, Under 8.5 47¢ |
| 7:07 p.m. | Cardinals vs. Blue Jays | STL 40¢, TOR 61¢ | STL +1.5 59¢, TOR -1.5 42¢ | Over 7.5 50¢, Under 7.5 51¢ |
| 7:10 p.m. | White Sox vs. Rays | CWS 43¢, TB 58¢ | CWS +1.5 62¢, TB -1.5 39¢ | Over 8.5 48¢, Under 8.5 53¢ |
| 7:10 p.m. | Diamondbacks vs. Guardians | ARI 46¢, CLE 56¢ | ARI +1.5 63¢, CLE -1.5 38¢ | Over 8.5 52¢, Under 8.5 49¢ |
| 7:10 p.m. | Marlins vs. Mets | MIA 46¢, NYM 55¢ | MIA +1.5 64¢, NYM -1.5 37¢ | Over 8.5 49¢, Under 8.5 52¢ |
| 7:15 p.m. | Nationals vs. Braves | WSH 48¢, ATL 53¢ | WSH -1.5 37¢, ATL +1.5 64¢ | Over 9.5 46¢, Under 9.5 55¢ |
| 8:15 p.m. | Rangers vs. Astros | TEX 47¢, HOU 54¢ | TEX +1.5 65¢, HOU -1.5 36¢ | Over 7.5 51¢, Under 7.5 50¢ |
| 8:40 p.m. | Royals vs. Rockies | KC 51¢, COL 50¢ | KC -1.5 41¢, COL +1.5 60¢ | Over 11.5 47¢, Under 11.5 54¢ |
| 9:38 p.m. | Brewers vs. Angels | MIL 61¢, LAA 40¢ | MIL -1.5 50¢, LAA +1.5 51¢ | Over 9.5 46¢, Under 9.5 55¢ |
| 9:40 p.m. | Tigers vs. Athletics | DET 60¢, OAK 41¢ | DET -1.5 49¢, OAK +1.5 52¢ | Over 10.5 52¢, Under 10.5 49¢ |
| 9:45 p.m. | Giants vs. Padres | SF 43¢, SD 58¢ | SF +1.5 61¢, SD -1.5 40¢ | Over 8.5 51¢, Under 8.5 50¢ |
| 10:10 p.m. | Red Sox vs. Dodgers | BOS 47¢, LAD 54¢ | BOS +1.5 65¢, LAD -1.5 36¢ | Over 8.5 53¢, Under 8.5 48¢ |
| 10:10 p.m. | Twins vs. Mariners | MIN 38¢, SEA 63¢ | MIN +1.5 57¢, SEA -1.5 45¢ | Over 7.5 53¢, Under 7.5 48¢ |
Polymarket MLB market takeaways
Friday’s Polymarket MLB board features several clear favorites, though prices suggest traders expect many games to remain competitive. Boston enters its matchup with Los Angeles as a modest underdog at 47¢, while the Red Sox +1.5 position carries stronger support at 65¢. Several other favorites also receive limited backing to cover the run line, reflecting a broader preference for underdogs to keep games close. Tight moneyline prices appear across multiple matchups, while the totals markets show only slight leanings rather than overwhelming conviction in either direction.
Polymarket odds shift in real time as traders process breaking news, injury reports, and overall market sentiment.
View and trade full Polymarket odds for MLB markets.
Polymarket promo code vs. Kalshi promo code: Which offer is better right now?
Polymarket and Kalshi give eligible U.S. users access to regulated event-trading markets and new-customer promotions. Here’s how the platforms differ:
Polymarket’s MASS promo code and Kalshi’s current welcome offer add extra value to Friday’s MLB schedule, although the platforms handle trading differently. Polymarket supports peer-to-peer transactions, while Kalshi matches orders through an exchange-style order book. Eligible new Polymarket users can apply MASS to receive promotional funds for Friday’s available baseball markets.
Verified Polymarket promo codes:
Polymarket lists MASS as a verified partner promo code. Other regional publishers may feature different codes, but each qualifying promotion provides eligible new users with the same $20 welcome bonus.
Conclusion: Claim Polymarket promo code MASS for Friday’s MLB board
Polymarket promo code MASS is available for Friday’s MLB schedule, giving eligible new users a way to explore a full day of baseball markets. New customers can enter MASS during registration, deposit at least $10 and receive $20 in bonus trading funds, creating a $30 starting balance. Prices may move before first pitch as confirmed lineups, pitching updates, bullpen availability, trade deadline news and trader activity reshape each contract.
Use Polymarket promo code MASS to access Friday’s featured matchups, including Red Sox vs. Dodgers and Yankees vs. Cubs, along with the platform’s broader selection of active MLB and prediction markets.
Must be 18 years or older and have a legal, U.S. residential address within the applicable state, D.C., or U.S. territories. Polymarket is a prediction market platform. Trading involves risk. Only participate where legally permitted and never trade more than you can afford to lose.
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