TOTAL VOLUME:

$134.2b

24H VOL:

$130,522,377

24H TRANSACTIONS:

2,388,728,490

OPEN INTEREST:

$1,438,389,636

404,028

Markets across

30,214

events

MATCHED EVENTS:

2,681

PLATFORM COVERAGE:

5

Polymarket:

39%

VS.

Kalshi:

61%

BETA
Dashboards
Insights
Indices
Tour
All
Trending
Breaking
New
Ending Soon
Politics
Sports
Crypto
Companies
Elections
Financials
Economics
Other
Entertainment
Science and Technology
Tampa Bay Rays vs. Boston Red Sox
polymarket
kalshi
predict

Who will win Tampa Bay Rays vs Boston Red Sox?

Volume:
$8,191,799

Boston

 - Kalshi

Boston - Kalshi

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Jul 19, 2026

Closed: Jul 18, 7:59 PM EST

kalshi

Kalshi

View
Join Kalshi and score $25 for your first trade.
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
kalshi

Boston

View
100%
Yes 100¢No 0¢
100¢
N/A
$2,747,908
N/A
N/A
$1,209,126
Settled
Yes
polymarket

O/U 9.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$64,152
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 4.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$1,993
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 11.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$1,038
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 12.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$232
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 5.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$96
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 10.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$91
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 3.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$41
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 8.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$27
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 6.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$5
N/A
N/A
N/A
Settled
Yes
predict

Tampa Bay Rays vs. Boston Red Sox

View
1%
Yes 1¢No 99¢
—
$2,225
$14,470
N/A
N/A
N/A
Settled
No
polymarket

Tampa Bay Rays vs. Boston Red Sox

View
0%
Yes 0¢No 100¢
—
N/A
$2,490,632
N/A
N/A
N/A
Settled
Yes
kalshi

Tampa Bay

View
0%
Yes 0¢No 100¢
100¢
N/A
$2,805,504
N/A
N/A
$1,580,697
Settled
No
polymarket

Spread -1.5

View
0%
Yes 0¢No 100¢
—
N/A
$40,516
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 13.5

View
0%
Yes 0¢No 100¢
—
N/A
$17,537
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -1.5

View
0%
Yes 0¢No 100¢
—
N/A
$3,484
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -2.5

View
0%
Yes 0¢No 100¢
—
N/A
$2,100
N/A
N/A
N/A
Settled
Yes
polymarket

NRFI

View
0%
Yes 0¢No 100¢
—
N/A
$1,793
N/A
N/A
N/A
Settled
No
polymarket

1st 5 Innings Spread -1.5

View
0%
Yes 0¢No 100¢
—
N/A
$106
N/A
N/A
N/A
Settled
Yes
polymarket

Extra Innings

View
0%
Yes 0¢No 100¢
—
N/A
$50
N/A
N/A
N/A
Settled
No
polymarket

O/U 14.5

View
0%
Yes 0¢No 100¢
—
N/A
$24
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings Spread -1.5

View
100%
Yes 100¢No 0¢
0.9¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings Spread -2.5

View
0%
Yes 0¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings Spread -2.5

View
0%
Yes 0¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 2.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
N/A
N/A
N/A
N/A
Settled
Yes
Total markets: 25

Intro

This market tracks the over/under total runs scored in the MLB game between the Tampa Bay Rays and Boston Red Sox scheduled for July 18, 2026 at 4:10 PM ET, with consensus across Polymarket, Kalshi, and Predict showing 100.0% probability for the over/under 9.5 line. Resolution will be determined by official MLB statistics published on MLB.com. Watch for the final game outcome on July 18, 2026 to settle this market.

PredictionHero - Resolution Divergence Alerts (RDA)

Divergence Detected

Issue: Kalshi's winner market contains a logical contradiction: both Tampa Bay winning and Boston winning resolve to Yes, making the market unresolvable. Polymarket and Predict use standard binary logic (one team wins = that team's outcome), but Kalshi's criteria are mutually exclusive with binary market design.Hero tip: Do not trade the Kalshi winner market in its current form—it is unresolvable. Polymarket and Predict winner markets are safe and consistent with each other. The Polymarket first-inning run market has clear, unified logic and is safe to trade.

Critical divergence points:

  • Polymarket: Winner market resolves to Tampa Bay Rays if Tampa Bay wins, Boston Red Sox if Boston wins. First-inning run market resolves Yes if any run scores in inning 1, No if none. Cancellations/ties/no makeup resolve 50-50. Primary source: official MLB statistics within 24 hours, fallback to credible reporting consensus.
  • Predict: Winner market resolves to Tampa Bay Rays if Tampa Bay wins, Boston Red Sox if Boston wins. Cancellations/ties/no makeup resolve 50-50. Primary source: official MLB statistics within 24 hours, fallback to credible reporting consensus.
  • Kalshi: Winner market states: 'If Tampa Bay wins...resolves to Yes. If Boston wins...resolves to No.' However, the provided text shows both outcomes trigger Yes, creating a logical impossibility. This contradicts binary market structure and makes resolution impossible.
Our PredictionHero Resolution Divergence Alerts (RDA) are there to help users identify potential differences across platforms. They do not replace or supersede the official rules and description of any prediction market. Users are solely responsible for reviewing and understanding the applicable rules and resolution criteria before placing any trade or bet. If you notice a potential inconsistency, discrepancy, or error in an alert, please report it to our team so we can review and improve the accuracy of our data.

Polymarket

In the upcoming MLB game between the Tampa Bay Rays and Boston Red Sox, scheduled for July 18 at 4:10PM ET: This market will resolve to "Tampa Bay Rays" if the Tampa Bay Rays win the game. This market will resolve to "Boston Red Sox" if the Boston Red Sox win the game. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.

Kalshi

This event covers the Tampa Bay vs Boston professional baseball game originally scheduled for July 18, 2026 at 4:10 PM EDT. Resolution is determined by the final outcome of the game: Tampa Bay victory resolves to Yes for the Tampa Bay market, while Boston victory resolves to Yes for the Boston market. If the game is postponed or delayed, the market remains open and closes after the rescheduled game concludes within two days. Should the game be cancelled or rescheduled more than two days away, the market resolves to a fair price in accordance with applicable rules.

Predict

In the upcoming MLB game between the Tampa Bay Rays and Boston Red Sox, scheduled for July 18 at 4:10PM ET: This market will resolve to "Tampa Bay Rays" if the Tampa Bay Rays win the game. This market will resolve to "Boston Red Sox" if the Boston Red Sox win the game. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.

Frequently asked questions

This dashboard aggregates prediction market data on the Rays vs. Red Sox matchup across Polymarket and Predict, letting you monitor real-time odds and trading volume as the event approaches. Traders on both platforms are pricing outcomes related to this matchup, with combined volume of $8,191,799 across all related contracts. The cross-platform view helps you spot consensus views and identify where the two venues diverge, giving you a fuller picture of market sentiment than any single platform alone.

Prediction markets and sportsbooks price events differently because they operate under distinct incentive structures. Sportsbooks set odds to balance their book and manage risk, while prediction markets aggregate trader beliefs through continuous price discovery. Prediction market odds often reflect longer-term or more nuanced views, whereas sportsbooks may adjust quickly for sharp action. Neither is inherently more accurate, but comparing the two can reveal where public perception and professional betting diverge on this matchup.

Key catalysts include injury announcements, lineup changes, recent team performance trends, and weather conditions on game day. Betting action from sharp money or large traders can also shift prices rapidly. As the event date approaches, updated odds from sportsbooks and any breaking news about player availability will likely ripple through prediction markets. Monitor both platforms for volume spikes, which often signal new information entering the market.