Jackson Koivun's Record 61 Sets Up a Sunday Showdown With Scheffler at the 3M Open

The 3M Open has turned into a coming-out party. Jackson Koivun, a 21-year-old who turned pro barely a month ago, fired a 10-under 61 on Saturday at TPC Twin Cities and takes a three-shot lead into Sunday's final round at 20 under. His back nine was a 28, a tournament record, capped by a 14-foot eagle putt on the 18th. This is his first career 54-hole lead on the PGA TOUR, and he's chasing his first win in what is basically his first month on the job. The Rookie Nobody Wants to Chase Koivun's resume explains why the golf world isn't treating this like a fluke. He was the top-ranked amateur in the world after a standout career at Auburn, and he turned pro right after the U.S. Open in June. Two weeks ago he tied for 10th at the ISCO Championship. This week he has gone 64-68-61, and Saturday's round included two eagles and six birdies on a hot, windless afternoon that was begging for low numbers. He eagled two of the three par 5s on the lake-heavy course, draining a 12-footer on 12 and that 14-footer on 18. When a player records the best back nine in tournament history to grab his first pro lead, the moment clearly isn't too big yet. Scheffler Is Lurking Six Back Here's where the final round gets interesting. Emiliano Grillo and Ben Kohles sit second at 17 under after matching 65s, and Michael Brennan and Chandler Phillips are one further back at 16 under. But the name everyone is watching is Scottie Scheffler, who shot a 7-under 64 on Saturday, including a chip-in eagle on the drivable par 4, to reach 14 under in a tie for ninth. Six shots is a big ask, even for the world No. 1. Scheffler would likely need something in the 59-to-61 range while Koivun goes flat. It's worth remembering that Michael Kim already shot a 59 at this tournament on Friday, so the course is clearly giving up historic numbers. Kim sits at 15 under himself. How the Board Looks for Sunday The books have reacted hard. Koivun has moved from a longshot number at the start of the week to a heavy favorite, with top-10 markets pricing him near a lock and outright markets giving chasers like Grillo, Kohles, and Scheffler live-dog prices. The case for Koivun is simple: three straight rounds of quality golf, a putter that's rolling, and a three-shot cushion on a course he's picking apart. The case against is just as simple: he's 21, he's never been here, and Sunday pressure with a first win on the line changes people. SBA Takeaway Final-round leaders with three or more shots of cushion convert at a high rate on TOUR, and Koivun's ball-striking this week backs up the price. If you want action, the more interesting markets are the placements: Grillo and Kohles at 17 under have top-5 value if Koivun wobbles, and Scheffler top-5 is a sneaky play given his Saturday form and closing pedigree. A six-shot comeback for the outright is asking for a career round, even from the best player on the planet. Whatever you do, keep stakes sensible. Historic weeks like this one are fun to watch even without a ticket. Related Reading - Michael Kim Shoots a 59 at the 3M Open and Flips the Whole Board - Scheffler at +260 for the 3M Open Is the Strangest Line in Golf - Ryan Fox Stuns Royal Birkdale With Clutch 18th Hole Birdie to Win The Open