Orioles vs Athletics Prediction Market Odds, August 28, 2026
| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
▶Orioles | — | O 1 39% | 56%54% | 56% Kalshi |
▶Athletics | — | U 1 61% | 47%47% | 47% Kalshi |
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Baltimore is the 55c moneyline favorite (56c Kalshi, 54c Polymarket) for Friday's 9:40 PM ET game at Sutter Health Park, a price implying roughly a 54% win probability after the vig. The Orioles are 65-68 and the Athletics 53-81, a 12-game separation the market is only charging 55c for. The starters explain the edge that does exist: Brandon Young carries a 3.50 ERA against Jacob Lopez's 4.98, and the Athletics own the worst staff ERA in the American League at 5.47.
Baltimore is 65-68 and 14 games behind Tampa Bay in the AL East, yet the Orioles sit only 2.5 games behind Cleveland (68-66) for the third American League wild card, and that gap is the only reason an Orioles vs Athletics game in the last week of August carries stakes. The Athletics are 53-81 and 13.5 games out in the AL West, playing the schedule out at Sutter Health Park. Both clubs arrive on two-game winning streaks, Baltimore 5-5 over its last 10 and the Athletics 4-6. The market makes Baltimore a 55c favorite on the cross-platform average, a soft number for a club 12 games better in the standings that also holds the starting-pitcher edge.
Orioles vs Athletics Market Context
The mound matchup is the cleanest input on this board. Baltimore hands the ball to Brandon Young, 9-3 with a 3.50 ERA, against Jacob Lopez, 5-4 with a 4.98 ERA for the Athletics. That is roughly a run and a half of earned run average between the two starters, and it is the argument for the Orioles at anything above a coin flip. Young's 9-3 record on a sub-.500 team is the more telling half of that line, since Baltimore has won three of every four games he has finished a decision in.
The team profiles narrow the gap that the starters open. Baltimore's staff carries a 4.17 team ERA, 17th in MLB, against a 5.47 mark from the Athletics that ranks 29th and is the worst in the American League. The offenses invert it: the Athletics hit .245 as a team, 15th in the league on 1,103 hits, while Baltimore hits .236, 26th in MLB on 1,036 hits. Run totals land within 18 of each other, 596 for the Orioles and 578 for the Athletics, so the run-scoring side of this game is close to even despite the 12-game separation in the standings.
Pete Alonso is the reason Baltimore scores at all. He leads the club at .276 with 32 home runs and 91 RBI, the only Oriole regular clearing .270. The Athletics counter with a spread-out group: Lawrence Butler leads the regulars at .227, Zack Gelof leads the club with 14 home runs, and Jeff McNeil leads with 46 RBI. No Athletics hitter carries the lineup the way Alonso carries Baltimore's, which puts more weight on Lopez keeping the ball away from one bat than on the Athletics matching run for run.
Venue splits explain most of the missing favorite's premium. The Athletics are 25-41 at Sutter Health Park, a worse home mark than their 28-40 record on the road, and Baltimore is 31-34 away from Camden Yards against 34-34 at home. Neither club is helped by the setting. A road team that wins 48% of its road games facing a home team that wins 38% of its home games is a favorite, but not a heavy one, and 55c is close to where those splits alone would price it before the pitching edge is added.
Line movement says the two books have converged rather than separated. The board began carrying snapshots on August 26, when Kalshi opened Baltimore at 60c against Polymarket's 53c, a 7c disagreement. Kalshi has drifted steadily down to 56c since, while Polymarket has traded a 51c to 56c band and sits at 54c. The spread between the venues is now 2c, with Polymarket holding the better price for anyone buying the Orioles. The Athletics side has been the quieter half of the board: Kalshi has held 47c across the series and Polymarket has traded 44c to 49c, landing on the same 47c. Kalshi carries essentially all the money here, $935 of the roughly $1.2K in lifetime volume on the Baltimore moneyline alone. Current prices on every line are on the live board above.
The Kalshi board also lists a first-inning run market for this game, priced at 39c, which has climbed from 33c since the snapshots began. That contract settles on whether either club scores in the top or bottom of the first and is a separate ticket from the winner.
When the Orioles vs Athletics Market Resolves
The market settles on the final score at Sutter Health Park in Sacramento on Friday, August 28, 2026, with first pitch scheduled for 9:40 PM ET on MASN and NBC Sports California. The Kalshi ticker and the ESPN schedule agree on that start, both encoding 9:40 PM ET. The moneyline pays the winning team's contract at $1 per share and settles the losing side at $0, with extra innings counted in the official result. Kalshi and Polymarket both wait for the game to be declared complete before settling.
Key Orioles vs Athletics Catalysts
- Young's ERA edge: Brandon Young (9-3, 3.50) carries roughly a run and a half of ERA advantage over Jacob Lopez (5-4, 4.98), the single largest input into Baltimore's 55c price.
- The Athletics bullpen problem: a 5.47 team ERA ranks 29th in MLB and worst in the American League, the reason Baltimore is favored despite a .236 team average that ranks 26th.
- Alonso concentration: Pete Alonso (.276, 32 HR, 91 RBI) is the only Baltimore regular above .270, so Lopez neutralizing one bat changes the run expectation more than usual.
- Wild card stakes: Baltimore is 2.5 games behind Cleveland (68-66) for the third American League wild card while the Athletics, 53-81, have nothing on the line.
- Cross-platform read: Kalshi has walked Baltimore from 60c down to 56c since August 26 while Polymarket sits at 54c, leaving Polymarket the better price on the favorite and the two books 2c apart.
- Venue split: the Athletics are 25-41 at Sutter Health Park, worse than their 28-40 road mark, and Baltimore is 31-34 away from Camden Yards.
Related Orioles vs Athletics Markets
Baltimore's wild card push prices on the season-long boards as well. The AL pennant market and the World Series market carry the postseason version of the race the Orioles are still technically inside, and the AL West market covers the division the Athletics have been out of since June. For every open contract on either club, the Baltimore Orioles hub and the Athletics hub collect the full slate, and MLB prediction markets covers the rest of the league's daily boards.
Resolution Criteria
The moneyline resolves to the team that wins the game at Sutter Health Park in Sacramento on Friday, August 28, 2026, scheduled for 9:40 PM ET. The winning team's contract pays $1 per share and the losing team's contract settles at $0, with the official final score including extra innings as the source of truth. The Kalshi first-inning market resolves Yes if either team scores at least one run in the first inning and No if the inning is scoreless. Kalshi and Polymarket settle once the game is declared official, so a weather-shortened game that reaches the regulation point settles on the score at that moment. A postponed game carries to its makeup date on both platforms, and a game canceled outright without a makeup voids and refunds under each platform's rules.
Key Factors
- Brandon Young (9-3, 3.50 ERA) holds roughly a run and a half of ERA advantage over Jacob Lopez (5-4, 4.98)
- The Athletics' 5.47 team ERA ranks 29th in MLB and worst in the American League
- Pete Alonso (.276, 32 HR, 91 RBI) is the only Baltimore regular hitting above .270
- Baltimore is 2.5 games behind Cleveland (68-66) for the third American League wild card
- Kalshi has moved Baltimore from 60c to 56c since August 26 while Polymarket sits at 54c
- The Athletics are 25-41 at Sutter Health Park, worse than their 28-40 record on the road
What are the current Orioles vs Athletics odds?
As of August 27, 2026, Baltimore trades at 55c on the cross-platform average (56c Kalshi, 54c Polymarket) and the Athletics at 47c on both books. The board has taken about $1.2K in lifetime volume, with $935 of it on the Baltimore moneyline.
Who is pitching in Orioles vs Athletics on August 28, 2026?
Baltimore starts Brandon Young, who is 9-3 with a 3.50 ERA. The Athletics start Jacob Lopez, who is 5-4 with a 4.98 ERA.
Where can I trade the Orioles vs Athletics market?
Both Kalshi and Polymarket list the game. Kalshi carries it under the KXMLBGAME series and adds a separate first-inning run market at 39c, and Polymarket lists the same matchup as a two-outcome moneyline.
When does the Orioles vs Athletics market resolve?
First pitch is 9:40 PM ET on Friday, August 28, 2026, at Sutter Health Park in Sacramento, and the market settles once the game is declared official. Extra innings count toward the final score.
What should I watch before the Orioles vs Athletics game starts?
Watch the Kalshi moneyline, which has walked Baltimore from 60c down to 56c since August 26 while Polymarket held near 54c, and watch the AL wild card scoreboard, since Baltimore sits 2.5 games behind Cleveland. A late scratch to Brandon Young would move this board more than any other single event.