Rookie Jackson Koivun defeated World No. 1 Scottie Scheffler by three strokes on Sunday to win the 3M Open [1, 2].
The victory marks a rare instance of a rookie overcoming the world's top-ranked player in a final-round showdown. Koivun's win comes in only his third professional start [3].
Playing at TPC Twin Cities in Blaine, Minnesota, Koivun maintained a steady pace throughout the final day [3, 8]. He posted a 5-under-36 66 in the final round [4], bringing his tournament total to a record 25-under-259 [5].
The conditions were challenging for the field as afternoon temperatures reached 97 °F [6]. Despite the heat and a late surge from Scheffler, Koivun remained composed to secure the three-stroke margin of victory [3].
Koivun, who is 21 years old, entered the tournament as an underdog against the established field [1, 3]. His performance on July 26, 2026, establishes him as a significant new talent on the PGA Tour [7].
Scheffler entered the final round as a favorite but could not close the gap created by Koivun's record-breaking total [2, 5]. The rookie's ability to play a safe and steady game under pressure proved decisive in the Minnesota heat [3].
“Jackson Koivun defeated World No. 1 Scottie Scheffler by three strokes”
Koivun's victory is a significant disruption to the current PGA Tour hierarchy, as few rookies manage to beat the World No. 1 in a tournament finale. By setting a tournament record at TPC Twin Cities, Koivun demonstrates a level of consistency and mental fortitude that typically takes years to develop, signaling a potential shift in the tour's competitive landscape.
