How Sepp Straka Won the 2025 American Express

Sepp Straka's 2025 American Express was a win with no headline category and almost no mistakes: 25 under par, 2 bogeys in four rounds, and not one strokes-gained category inside the top 7 of the field. Next to a hot putter, the 2 bogeys are the more interesting number.

Sepp Straka won at the Nicklaus Tournament Course, 25 under par, by 2 strokes, leading after 54 holes. Our Winner Database, built on Data Golf's strokes-gained numbers, credits the putter with the single largest share of his advantage: 45%, plus 3.8 strokes on the field, well ahead of the 26% that the 2 winners before him this season had averaged from the same club. That season comparison is thin, just 2 winners so far, and I will say so again before we are done.

But the fuller record tells a rounder story than "he putted well." Straka gained on the field in all four strokes-gained categories that week, and his best rank in any single one of them was only 8th. Read that twice: this is a win built by not being bad anywhere, more than a win built by being great somewhere.

How the win was built

Scoring conversion: 27 birdies or better, 2 bogeys against a field average of 5.7, 0 double bogeys or worse, over 72 holes. Final round 70, +0.6 strokes against the field that day. Led after 54 holes.

*Average share across the 2 earlier 2025 winners with a strokes-gained record. Shares count only the categories where the winner beat the field, so a category where he lost strokes reads 0%, and rounding can leave the four shares a point short of or above 100. Strokes gained: Data Golf. The field is the 71 players who completed all four rounds.

Begin with the flat stick, since it carried the largest share. Plus 3.8 strokes better than the field, 45% of his total advantage, 8th of 71 players who completed all four rounds. And here is the number the whole week turns on: 8th was his best rank in any of the four categories. Seven players putted better than Sepp Straka that week, and every one of them went home without the trophy.

Approach was next, plus 2.3 strokes, 17th of 71, 28% of the advantage, a little over a quarter of his total edge. The 2 winners before him this season, at The Sentry and the Sony Open, had averaged 53% of their edge from approach play, more than half. The club that carried the season's first 2 champions went quiet, and the win came anyway.

Off the tee, plus 1.4 strokes, 18th of 71, 16% of the advantage, against a 10% share for the 2 winners before him. A tick above the early-season norm, nothing more dramatic than that.

Around the green, plus 0.9 strokes, 24th of 71, 10% of the advantage, close to the 11% the 2 prior winners averaged there. That was his weakest rank of the week, and nowhere in the Winner's Five did he give strokes back.

Then the fifth member of the Winner's Five, scoring conversion, and this is where the week turns unusually clean. Twenty-seven birdies or better. Two bogeys, against a field average of 5.7, so the field made almost three times as many bogeys as the champion did. Zero double bogeys or worse, across 72 holes. He led after 54 holes and closed with a final round of 70, plus 0.6 strokes on the field that day, a number that was, through the season's first 3 winners, the smallest final-round total in the database.

The winning formula

Mistake-Free Win, the 2nd of the 2025 season. The rule: no double bogey or worse and four or fewer bogeys across 72 holes. This week: 2 bogeys, zero doubles over 72 holes.

Winning-formula ledger for 2025 through this event: Mistake-Free Win 2, Ball-Striking Blueprint 1.

The Winner Database files this as a Mistake-Free Win: no double bogey or worse, and four or fewer bogeys, across 72 holes. It is the 2nd Mistake-Free Win of the 2025 season, and the label fits without an asterisk, 2 bogeys, zero doubles, exactly the shape the rule describes.

The only earlier winner carrying the same label is Hideki Matsuyama, whose win at The Sentry in January also closed with 2 bogeys and zero doubles. The 2 cleanest cards of the young 2025 season belong to the 2 Mistake-Free winners. Through this event the ledger read Mistake-Free Win 2, Ball-Striking Blueprint 1, and both Mistake-Free wins share the same shape: a card with nothing on it, rather than a card with one loud number on it.

What this week added to the season

Across the 2 2025 winners before this one (2 with a strokes-gained record; the averages use those 2): average winning margin 1.5 strokes, average bogeys 3.5, average shares of advantage off the tee 10%, approach 53%, around the green 11%, putting 26%. This winner: margin 2, bogeys 2.

Across the 2 winners before him this season, the typical margin was 1.5 strokes and the typical bogey count 3.5. Straka won by 2 and made 2 bogeys, a touch more separated and a touch cleaner than the early-season norm, though with only 2 winners in the comparison, "norm" is a generous word for it.

His only other 2025 win in the database came later that season, at the Truist Championship in May, and it read like the same script in looser handwriting: putting again carried the largest share, 66%, plus 8.7 strokes, but that week also carried 6 bogeys and a short-game number in the red. The American Express was the tidier version of the same formula. Two data points from one player is a pattern worth noticing, not a rule to build a season on, and the same caution applies to the season averages in this piece: with only 2 winners preceding him when he won, they describe January 2025, not a full year.

The Data Action angle

Hot streaks and bad breaks make the easy story, and this week offered neither. There was no 6-birdie flurry to isolate, no back-nine save to freeze-frame. What the strokes-gained record shows instead is a leaderboard's quiet version of dominance: four categories, four positive numbers, a worst rank of 24th of 71.

The scorecard tells the same story. A field that averaged 5.7 bogeys for the week watched a winner make 2. That is not a moment a highlight reel can use, it is an absence of moments, which is exactly why the strokes-gained record notices it when a leaderboard does not.

One line I want to be careful with. Putting produced 45% of Straka's measured advantage over the field, and the numbers support that. "Putting is why he won" is a different claim, and the record does not support it. Strokes gained measures distance from the field average, not distance from the runner-up, and 7 players putted better than Straka that week without winning anything. What the record can tell you is where the advantage came from, and how little of it came from anywhere giving strokes back. What it cannot tell you is that the putter caused the trophy.

The amateur translation

Strip it down to what he did. He gained on the field with the putter without being the best putter in the field, and he refused to let one bad hole become a worse one. Two bogeys and zero doubles across 72 holes is not a hot week. It is a disciplined one.

The underlying scoring principle: the strokes a pro gains with the flat stick are rarely dramatic makes from well outside makeable range. Mostly they are the three-putt that never happens. A first putt that dies near the hole hands you a tap-in and a walk to the next tee. A first putt that runs well past the hole hands you a knee-knocker and, often enough, a square on the card.

What does that look like at your level? If you are a 5 handicap, your leak with the putter is rarely the make percentage, it is the long lag putt that finishes too far away to trust. For a 15, the read matters less than the speed: a first putt that finishes close, from any angle, beats a perfect line that runs past. If you are a 25, change how you count a good hole. A two-putt from anywhere on the green, even the back fringe, is a result worth being pleased with, and chasing makes is how a 25 handicap turns a manageable bogey into a three-putt double.

One practical action. Over your next several rounds, every time you three-putt, write down one number: how far away the first putt started. Do not change your stroke. Do not buy a new putter. Just collect the distances. Noticing your own pattern before anyone can teach it to you is Fred Shoemaker's idea, not mine, and since feel misleads about which misses are speed and which are read, writing the number down beats trusting the memory of it. Data Action Golf splits your three-putts the same way, by first-putt distance, lag misses against pressure misses, because those are two different problems. If the read turns out to be the real leak, Putting IQ teaches the physics under it, why the ball moves the way it does on a slope, so you stop guessing.

Three findings

1. Putting carried the largest share, but this was a no-weakness win, not a hot-putter win. He gained on the field in all four strokes-gained categories, and his best rank in any of them was 8th of 71.
2. Mistake avoidance mattered too. Two bogeys and zero doubles against a field average of 5.7 tie him for the fewest bogeys posted by any winner in the 2025 database.
3. He led after 54 holes and closed it out without incident. A final round of 70, plus 0.6 strokes on the field, the smallest final-round number posted by any winner up to that point in the 2025 season.

This week came down to a scorecard with nothing on it left to explain away.

How to read these numbers

Strokes gained figures are Data Golf's, summed over the winner's four rounds and stated against the field's average for each round, so a positive number is strokes better than the field. Field ranks compare the 71 players who completed all four rounds. "Share of advantage" is the Data Action Golf reading: a category's strokes gained as a percentage of the winner's total across the categories where he beat the field. The 2025 winner average share is the mean of that figure across the season's earlier winners with a strokes-gained record, so it moves as the season goes on. The winning-formula label is assigned by fixed rules checked in a set order; the first rule that fits wins, and the labels describe how one week's advantage was distributed, nothing more. These numbers describe this tournament. They do not predict the next one. Full method: how Data Action Golf reads a winner and what strokes gained measures.