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Philadelphia Phillies vs. St. Louis Cardinals

How the prediction market is pricing "Philadelphia Phillies vs. St. Louis Cardinals" right now — Polymarket mid plus comparison with Betfair and Manifold.

O/U 3.5 56% Extra Innings 50% O/U 2.5 50% Philadelphia Phillies vs. St. Louis Cardinals 49% Volume: $291K Liquidity: $742K Closes: 18 Aug 2026
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Philadelphia Phillies vs. St. Louis Cardinals

Platform comparison

PlatformYES oddsNO oddsFeeKYCSettlement
Polymarket (via Champions League Prediction) Pick
polygram.ink (preferred broker)
56% 44% 0% (USDC on-chain) No-KYC up to $1,500 USDC, auto via UMA oracle See live odds →
Polymarket (direct)
polymarket.com
56% 44% 0% Geo-blocked in US/UK/EU USDC, on-chain See live odds →
Kalshi
kalshi.com
Up to 7% per trade US-only, KYC required USD See live odds →
Betfair Exchange
betfair.com
2-5% commission Full KYC from first trade GBP / EUR See live odds →
Manifold Markets
manifold.markets
Play-money (mana) None — play-money Mana (no cash-out) See live odds →

Outcome probabilities

Current market-implied probability for each outcome, from the live order book.

OutcomeProbability
O/U 3.556%
Extra Innings50%
O/U 2.550%
Philadelphia Phillies vs. St. Louis Cardinals49%
O/U 5.541%
O/U 4.529%
Spread -1.528%
Spread -1.521%
Spread -2.514%
O/U 6.514%
Spread -2.511%
O/U 7.58%
O/U 8.55%
O/U 9.53%
NRFI0%
1st 5 Innings Spread -1.50%
1st 5 Innings Spread -1.50%
1st 5 Innings O/U 2.50%
1st 5 Innings O/U 3.50%
1st 5 Innings O/U 4.50%
1st 5 Innings O/U 5.50%
1st 5 Innings O/U 6.50%

Market context

The Philadelphia Phillies’ latest meeting with the St. Louis Cardinals finished 6-5 to Philadelphia, and that result is a useful guide to how tight this matchup can be rather than a clean read on a favourite. The Phillies came in at 64-56 and 32-26 on the road, while St. Louis was 59-60 and 30-34 at home, so the market’s 49% YES price sits close to a genuine coin-flip despite Philadelphia’s better season record.[1][9] Recent head-to-head data also leans Phillies: they have gone 13-7 across the last 20 games against St. Louis, which frames the current line as one where historical edge and current table position both point mildly towards Philadelphia rather than a strong mismatch.[17]

Recent form gives Philadelphia the cleaner case, but not by a wide margin. AP noted the Phillies were bringing a three-game road winning streak into the matchup, with a 7-3 run over their last 10 games, a .264 team batting average and a 3.29 ERA, while St. Louis had been 5-5 over its previous 10 with a 3.83 ERA.[9] Philadelphia’s attack still runs through Kyle Schwarber, who leads the club in extra-base hits and homers, while Bryce Harper has also been producing over the past 10 games.[9] For St. Louis, Alec Burleson and Jordan Walker have been the key recent bats, but the Cardinals’ lower home record means line-up strength has to offset venue disadvantage.[9][18]

The main live catalysts are pitching, line-up confirmation and any late injury changes. CBS Sports’ live game coverage listed Cristopher Sánchez for Philadelphia and said he has been less effective since mid-June, carrying a 4.47 ERA over his last 10 starts, which matters because one strong or weak outing can swing a market this tight.[7] AP’s injury notes showed only a short list of absences on both sides, with Philadelphia missing several depth pieces and Aaron Nola listed day-to-day, while St. Louis had Ramon Urias and Max Rajcic on the 60-day injured list.[9] Any late scratch, rest day or bullpen management wrinkle is more relevant here than broad season averages, because the settlement depends on one completed game and the price already assumes a narrow margin.[9]

Sources: 1 · 2 · 3 · 4 · 5

Live Data & Statistics

The Polymarket order book prices O/U 3.5 at 56% for "Philadelphia Phillies vs. St. Louis Cardinals".

O/U 3.5 56% Other 44%

Live stats load when the match begins. Current market odds are shown above. Trading volume: $291K.

Methodology

Football-specific comparison page for Philadelphia Phillies vs. St. Louis Cardinals. Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi (US-focused) or Manifold (play-money).

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

UK Frequently Asked Questions

When do sports markets resolve?
Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.
Can I bet on individual matches?
Yes, Polymarket lists every major Premier League / Champions League / World Cup match as its own market. Liquidity varies — top matches like El Clásico or a semi-final often have six-figure pools, lower-league games closer to three-figure.
What are live sports odds on Polymarket?
Some top-tier matches stay open during play — you can trade the half-time probability in the 70th minute. Polymarket mid-prices update second-by-second; any frontend mirroring the order book shows the same movement.
Which sports markets are available?
Football (soccer) dominates — Champions League, World Cup, Premier League, La Liga, Bundesliga — followed by NFL, NBA, tennis Grand Slams, Formula 1, boxing/MMA. Resolution via official league source confirmation.
Can I trade Premier League prediction markets from the UK?
Yes. Polymarket has Premier League outcome markets (title winner, relegation, top scorer). For UK traders wanting GBP settlement and UKGC protection, Betfair Exchange and Smarkets offer Premier League futures and match markets. Betfair is the deepest liquidity venue for UK football exchange markets.
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