Every big number on the board at Royal Birkdale sets off a chain reaction. A roar rolls out along the dunes, and somewhere online, a price moves.
Friday's second round doubled as cut day at The Open Championship, and Kalshi traders are tracking who still looks like a winner once the weekend field is set.
How the Open Championship Cut Works
The Open trims its 156-man field down to the top 70 players, plus anyone tied at that mark, after 36 holes: a cutoff it shares only with the PGA Championship among the four majors.
The U.S. Open keeps 60 and ties, and the Masters just 50. That extra room means Friday afternoon at Birkdale turns into a math problem as much as a golf tournament, with players a shot or two off the number recalculating their odds hole by hole.
Scottie Scheffler Pulls Clear on Kalshi
On Kalshi's The Open Championship Winner, the defending champion has separated himself from the pack.
Scottie Scheffler's share has climbed steadily through the second round, and he now sits well ahead of the next-closest name, a shift that lines up with a round that kept him comfortably inside the cut and near the top of the leaderboard. It marks a notable turnaround for a player who missed the weekend at last week's Scottish Open.
Cameron Young Holds; Bryson DeChambeau Falls Back
Cameron Young holds the next-largest share in the market, trailing Scheffler but well clear of the rest of the field.
Bryson DeChambeau looked poised to chase the lead after firing an apparent second-round 66, but a post-round ruling turned his afternoon upside down.
R&A officials assessed DeChambeau a two-shot penalty for inadvertently improving his lie in the rough on the fifth hole, turning his 66 into a 2-under 68. The penalty dropped him from one shot back to three shots off the lead, and DeChambeau walked straight from the scoring tent to the driving range, passing reporters without stopping to talk.
Lucas Herbert and Sam Burns Force Their Way In
Nobody moved the market more than Lucas Herbert and Sam Burns, who matched a major championship scoring record with matching 8-under 62s in the second round.
Both were priced as afterthoughts entering the day; both now carry real, if modest, shares in the winner market. It's the kind of round that turns a longshot into a live one.
The Weekend Picture Comes Into Focus
Not everyone got to keep playing.
Past major champions like Aaron Rai, Wyndham Clark and Matt Fitzpatrick have played their way out of the weekend. But others, like Rory McIlroy, are through to the weekend.
