TOTAL VOLUME:
$61.6b
24H VOL:
$215,176,776
24H TRANSACTIONS:
595,647,402
OPEN INTEREST:
$1,321,740,341
576,656
Markets across
14,624
events
MATCHED EVENTS:
4,045
PLATFORM COVERAGE:
4
Polymarket:
50%
VS.
Kalshi:
50%
Will Julian Sayin be the first overall pick in the 2027 Pro Football Draft?
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$500
Trade on Polymarket
At 85¢ buys you 118 shares | Odds: 85% Total Payout: $118 | Net Profit: $18 Multiplier: 1.18x | ROI: 18% | APY: 21% 317 days to resolution
Trade on Kalshi
Join Kalshi and score $25 for your first trade.At 5¢ buys you 2,000 shares | Odds: 5% Total Payout: $2,000 | Net Profit: $1,900 Multiplier: 20.00x | ROI: 1,900% | APY: 21% 340 days to resolutionIntro
This market tracks whether Byrum Brown will be selected first overall in the 2027 Pro Football Draft. Aggregated data from Kalshi and Polymarket shows a consensus probability of 90.0% for Brown being the top pick. Resolution will be determined by official NFL information from the 2027 Pro Football Draft, with credible reporting consensus serving as a secondary source if official data is delayed. Watch for any roster moves, coaching changes, or team performance shifts leading up to the draft scheduled for mid-May 2027.
PredictionHero - Resolution Divergence Alerts (RDA)
Unified Resolution Criteria (Consistent across platforms)
Primary resolution logic:
Official NFL information from the 2027 Pro Football Draft; credible reporting consensus may serve as secondary source if official data is delayed.Core resolution logic:
- Market resolves YES if and only if the named player is selected as the 1st overall pick in the 2027 NFL Draft.
- Market resolves NO if any player other than the named player is selected 1st overall.
- Polymarket catch-all market (someone else) resolves YES if any player not explicitly named on the platform is selected 1st overall.
- If the 2027 NFL Draft is canceled, postponed, or not completed by May 9, 2027, Polymarket resolves to Other; Kalshi resolution protocol for cancellation is not explicitly stated.
Edge cases & Clarifications:
- Draft Cancellation or Postponement: Polymarket explicitly resolves to Other if draft is canceled, postponed, or not completed by May 9, 2027. Kalshi does not specify a cancellation protocol; standard market suspension or Other resolution would likely apply.
- Player Name Ambiguity: Polymarket uses coded player identifiers (Player A, Player I, etc.) alongside named players. Kalshi lists players by full name. Both platforms must ensure unambiguous mapping to the actual 2027 draft pick to avoid resolution disputes.
- Catch-All Market: Polymarket includes a 'someone else' market (question 58) that resolves YES if any player not explicitly listed across all 90 markets is selected 1st overall. This ensures complete coverage.
- Multiple Platforms, Single Event: Both Kalshi and Polymarket resolve to the same underlying fact: the official 1st overall pick. Cross-platform arbitrage risk is minimal if both use official NFL data as source.
Timing:
Resolution occurs on or immediately after the 2027 NFL Draft (scheduled for April 2027). Polymarket sets explicit deadline of May 9, 2027 for draft completion; if not met, market resolves to Other. Kalshi does not specify a deadline but resolution is expected within days of the official draft announcement.Frequently asked questions
Prediction markets like Kalshi and Polymarket often reflect different information sets and trader demographics than traditional sportsbooks. Prediction markets aggregate dispersed knowledge from thousands of participants trading with real money, while sportsbooks set odds to balance liability and extract margin. For the 2027 first overall pick, prediction market odds may diverge from sportsbook lines due to differences in liquidity, trading hours, regulatory constraints, and the types of bettors active on each venue. Comparing both sources provides a fuller picture of true consensus probability.
Kalshi and Polymarket can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. Kalshi and Polymarket operate under different regulatory frameworks, liquidity pools, and user bases, which can create temporary price gaps. Kalshi currently shows for the top outcome, while Polymarket reflects , a spread of percentage points. These differences arise from variations in order flow, trading hours, fee structures, and how each platform's community weights draft signals like pro-day performances, combine metrics, and team needs. Arbitrage traders typically exploit such gaps, gradually aligning prices over time.
Major catalysts include college football season performance, NFL Combine results, pro-day workouts, injury reports, and team ownership or coaching changes that alter draft priorities. Trade activity and draft-order shifts can also reshape expectations. Media mock drafts, analyst consensus updates, and statements from front offices about positional needs drive sentiment shifts. Player interviews, character concerns, or medical red flags emerging closer to draft day can rapidly reprrice odds. Additionally, trades involving the top pick holder or surprise roster moves by contending teams may signal strategic pivots that influence which prospect is ultimately selected first.
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