| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
▶Phillies | -1.5 38%34% | O 6.5 73% | 29%29% | 29% Kalshi |
▶Twins | +1.5 62%66% | U 6.5 27% | 24%25% | 25% Polymarket |
| Spread | Total | Moneyline | Best ML | |
|---|---|---|---|---|
▶Philadelphia Phillies | -1.5 | O 6.5 | 29% Kalshi | |
▶Minnesota Twins | +1.5 | U 6.5 | 25% Polymarket |
There is no favorite here. Minnesota is 51c and Philadelphia is 50c, and Kalshi and Polymarket agree to the cent on both sides, which makes this the tightest board on the August 13, 2026 MLB slate. The two prices sum to 101c, so the only spread on the screen is the platform vig, not a directional read. That is a hard move off Philadelphia, which was priced 61c as a road favorite at St. Louis on August 12, 2026. The Phillies arrive 64-58 with Aaron Nola (3-9, 5.47 ERA) starting, the Twins are 60-62 and hand the ball to Taj Bradley (9-4, 3.76 ERA), and the game is the Field of Dreams Game in Dyersville, Iowa, with Minnesota carrying the home designation.
A moneyline that reads 50c and 51c with identical quotes on both venues is the market saying it has no read. Philadelphia (64-58) and Minnesota (60-62) meet at the Field of Dreams site in Dyersville, Iowa, on August 13, 2026, with a 7:30 PM ET first pitch, and the board carries roughly $10.5K in cumulative volume across Kalshi and Polymarket. The pitching matchup argues loudly for Minnesota. The lineup argues loudly for Philadelphia. The two arguments have cancelled to a single cent.
The moneyline is the cleanest cross-platform agreement on the slate. Kalshi has Minnesota at 51c and Philadelphia at 50c. Polymarket has Minnesota at 51c and Philadelphia at 50c. There is no venue-to-venue gap to discuss, which is unusual on a low-volume regular-season board and a sign both books are pricing off the same information rather than off thin one-sided flow. The traded interest is lopsided even though the price is not: the Philadelphia side accounts for about $4.3K of the moneyline's cumulative volume against about $1.7K on the Minnesota side, and that imbalance has not pushed the number.
Movement has been flat. Across the overnight snapshot window into August 13, 2026, Kalshi held Minnesota at 51c and Philadelphia at 50c without a tick, and Polymarket's Philadelphia side moved once, from 49c to 50c. The interesting move is the one that already happened. Philadelphia traded at 61c as a road favorite at St. Louis on August 12, 2026 and lost that game 7-1, and the 11c repricing between that board and this one is the largest single-day shift on any Phillies board this week. ESPN's odds feed points the same direction: Philadelphia opened as the favorite for this game and Minnesota is now the listed side at -114.
The starters are why the number should not be a pickem on paper. Nola is 3-9 with a 5.47 ERA. Bradley is 9-4 with a 3.76 ERA. A 1.71-run ERA gap in favor of the home starter usually drags a moneyline five to eight cents, not one. What the market is doing is paying for the Philadelphia lineup against the Minnesota lineup: Kyle Schwarber has 35 home runs, Bryce Harper leads the club with 71 RBI, and Brandon Marsh hits .273. Minnesota's top end is thinner, with Josh Bell at 72 RBI and Kody Clemens at 20 home runs. The board prices that trade-off almost exactly even, and it shows up in the props too, where Schwarber's 1+ home run sits at 25c and Harper's at 19c against 53c for Bradley to record 6+ strikeouts.
The derivative markets say the same thing the moneyline says. Kalshi's full-game run line has Philadelphia at -1.5 for 37c and Minnesota at -1.5 for 34c, and Polymarket has Philadelphia -1.5 at 38c and Minnesota -1.5 at 34c. Add those and neither side clears 40c to win by two or more, so a one-run game is the modal outcome on both books. The total pivots at 8.5 runs, priced 52c for the over on Kalshi and 52c on Polymarket, matching the 8.5 posted at the sportsbook per ESPN. Over 9.5 runs is 41c on Kalshi and 42c on Polymarket. Even the first-inning market is a coin flip, with a run in the opening frame at 50c on Kalshi and 51c on Polymarket.
Form and stakes cut in opposite directions. Philadelphia has lost two in a row and dropped two of three at St. Louis, and at 9.5 games behind Atlanta in the NL East the wild card is the club's live path. Minnesota took two of three from Baltimore, sits 3.5 games behind Chicago in the AL Central, and is closer to its division than the Twins record of 60-62 suggests. ESPN's matchup predictor is more decisive than the market, giving Minnesota 57.1%, roughly six points above the 51c the board pays. That gap is the honest measure of how much weight a model puts on the starter differential versus how much the market is discounting Nola's win-loss record as noise around a rebounding arm.
One structural note that the home designation hides: this is not Target Field. Dyersville is a neutral, open-air site, so Minnesota's 32-28 home record and Philadelphia's 32-28 road record are both weak guides. The last two games of the set move to Target Field on August 15 and August 16, 2026, where the standard home split applies again.
The market resolves the same night. First pitch is 7:30 PM ET on August 13, 2026, and both platforms settle once the game is official and final. The moneyline pays the winning club, the run line settles on the final margin, and the total settles on combined runs including extra innings. Rain is a live variable at an open-air Iowa field in August, and a suspension pushes settlement to the completion date rather than voiding the contract.
Compare this board against the rest of the MLB market slate, where most game boards carry a five-cent or wider favorite and this one does not. The Phillies team hub tracks the road trip that started at St. Louis, and the Twins team hub carries the AL Central race that gives Minnesota the larger stake in the result. For the rest of the day's cross-platform boards, including the Red Sox at Blue Jays matchup, the full slate is on today's board.
The moneyline resolves to the team that wins the game at the Field of Dreams site in Dyersville, Iowa, scheduled for 7:30 PM ET on August 13, 2026. Kalshi lists the contest under ticker KXMLBGAME-26AUG131930PHIMIN and Polymarket carries the matching MLB event, and each winning contract pays $1 per share while the losing side settles at zero. The run line settles on the final margin, so a side at -1.5 needs a win by two or more runs, and the total settles on combined runs scored, so the over at 8.5 needs nine or more. Extra innings count toward both the run line and the total. If the game is suspended and completed on a later date, both platforms settle on the official completed result. If it is postponed outright and not made up, contracts void and stakes are returned under each platform's published rules.
As of August 13, 2026, Minnesota is 51c and Philadelphia is 50c, with Kalshi and Polymarket posting identical prices on both sides. The two quotes sum to 101c, which is the platform vig rather than an edge.
Functionally nobody. Minnesota at 51c implies about 51% and Philadelphia at 50c implies about 50%, the tightest game board on the slate. ESPN’s matchup predictor is more decisive, giving Minnesota 57.1%.
Kalshi lists it under ticker KXMLBGAME-26AUG131930PHIMIN and Polymarket carries the matching MLB event. The moneyline accounts for roughly $6.0K of the board’s $10.5K cumulative volume as of August 13, 2026.
Philadelphia starts Aaron Nola (3-9, 5.47 ERA) and Minnesota starts Taj Bradley (9-4, 3.76 ERA), per ESPN probables for August 13, 2026. The 1.71-run ERA gap favors Minnesota and the market prices it at one cent.
Confirmed lineups first, particularly Minnesota’s with Byron Buxton on the 10-day injured list, then whether the 8.5 total holds at 52c into first pitch. Weather at an open-air field in Dyersville, Iowa is the other live variable on August 13, 2026.