Bryson DeChambeau is at Oakmont Country Club this week to defend his title at the 2025 U.S. Open Championship. The 2025 edition of the tournament begins today and runs from June 12 to 15. Ahead of the opening round, DeChambeau played a practice round at arguably one of golf’s toughest venues.The defending champion posted a short clip from his session on Instagram, showing a smooth swing off the tee."Prep Work," DeChambeau captioned his short clip.Bryson DeChambeau hitting a tee shot during a practice round at the 2025 U.S. Open (via @brysondechambeau)While stars like Rory McIlroy and Phil Mickelson were seen struggling in Oakmont’s thick rough, DeChambeau made a clean tee shot. Speaking to ESPN, ahead of the event, Bryson DeChambeau reflected on the challenging course of Oakmont. “I think everybody knows this is probably the toughest golf course in the world right now," he said.He added, “You have to hit the fairways, you have to hit greens, and you have to two-putt, worst-case scenario. When you’ve got those putts inside 10 feet, you’ve got to make them.”Bryson DeChambeau won the 124th U.S. Open by one shot over Rory McIlroy. He secured the win with a 50-yard bunker shot to save par on the final hole. He finished the event at six-under-par with a total score of 274, after rounds of 67, 69, 67, and 71. This was his second major title. Bryson DeChambeau won his first U.S. Open in 2020.When will Bryson DeChambeau tee off at the U.S. Open 2025?Bryson DeChambeau is scheduled to tee off at 7:29 a.m. on Thursday, June 12, in the first round of the 2025 U.S. Open. He will play alongside Xander Schauffele and Jose Luis Ballester Barrio.Here is the complete tee time for the first round:Tee No. 16:45 a.m. – Matt Vogt (a), Kevin Velo, Trent Phillips6:56 a.m. – Chandler Blanchet, Alvaro Ortiz, Doug Ghim7:07 a.m. – Evan Beck (a), Maxwell Moldovan, Justin Hicks7:18 a.m. – Harris English, Tommy Fleetwood, Keegan Bradley7:29 a.m. – Xander Schauffele, Jose Luis Ballester Barrio, Bryson DeChambeau7:40 a.m. – Matt Fitzpatrick, Wyndham Clark, Gary Woodland7:51 a.m. – Akshay Bhatia, Matt McCarty, Robert MacIntyre8:02 a.m. – Cam Davis, Davis Thompson, Thomas Detry8:13 a.m. – Richard Bland, Trevor Gutschewski (a), Lanto Griffin8:24 a.m. – Edoardo Molinari, Sam Stevens, Ryan Gerard8:35 a.m. – Thriston Lawrence, Noah Kent (a), Thorbjørn Olesen8:46 a.m. – Jinichiro Kozuma, Cameron Tankersley (a), Chase Johnson8:57 a.m. – Philip Barbaree, Riley Lewis, Brady Calkins12:30 p.m. – Frederic LaCroix, Emiliano Grillo, Sam Bairstow12:41 p.m. – Byeong Hun An, Joe Highsmith, Ryan Fox12:52 p.m. – Victor Perez, Jacob Bridgeman, Adam Schenk1:03 p.m. – Min Woo Lee, Justin Thomas, Brooks Koepka1:14 p.m. – Sam Burns, Nico Echavarria, Denny McCarthy1:25 p.m. – Viktor Hovland, Collin Morikawa, Scottie Scheffler1:36 p.m. – Corey Conners, Jason Day, Patrick Reed1:47 p.m. – Joaquin Niemann, Bud Cauley, Daniel Berger1:58 p.m. – Mackenzie Hughes, Tony Finau, Chris Kirk2:09 p.m. – Ben James (a), Rasmus Højgaard, Stephan Jaeger2:20 p.m. – Rasmus Neergaard-Petersen, Justin Hastings (a), Laurie Canter2:31 p.m. – Frankie Harris (a), Emilio Gonzalez R., Roberto Díaz2:42 p.m. – Grant Haefner, Joey Herrera, George KneiserTee No. 106:45 a.m. – Zac Blair, Scott Vincent, Alistair Docherty6:56 a.m. – Jacques Kruyswijk, Jordan Smith, Eric Cole7:07 a.m. – Tom Kim, J.J. Spaun, Taylor Pendrith7:18 a.m. – Ludvig Åberg, Adam Scott, Hideki Matsuyama7:29 a.m. – Ben Griffin, Andrew Novak, Maverick McNealy7:40 a.m. – Shane Lowry, Justin Rose, Rory McIlroy7:51 a.m. – Patrick Cantlay, Si Woo Kim, Lucas Glover8:02 a.m. – Cameron Smith, Brian Harman, Phil Mickelson8:13 a.m. – Niklas Norgaard, Brian Campbell, Justin Lower8:24 a.m. – Davis Riley, Jackson Koivun (a), Johnny Keefer8:35 a.m. – James Hahn, Mark Hubbard, Michael La Sasso (a)8:46 a.m. – Joakim Lagergren, Mason Howell (a), Chris Gotterup8:57 a.m. – Zach Bauchou, Jackson Buchanan, Lance Simpson (a)12:30 p.m. – Will Chandler, Andrea Pavan, Takumi Kanaya12:41 p.m. – Bryan Lee (a), Guido Migliozzi, Preston Summerhays12:52 p.m. – Erik van Rooyen, Max Greyserman, Matt Wallace1:03 p.m. – Russell Henley, Christiaan Bezuidenhout, Nick Taylor1:14 p.m. – Jordan Spieth, Jon Rahm, Dustin Johnson1:25 p.m. – Tyrrell Hatton, Sungjae Im, Sepp Straka1:36 p.m. – Cameron Young, Tom Hoge, J.T. Poston1:47 p.m. – Jhonattan Vegas, Michael Kim, Matthieu Pavon1:58 p.m. – Marc Leishman, Aaron Rai, Nick Dunlap2:09 p.m. – Matthew Jordan, Yuta Sugiura, Carlos Ortiz2:20 p.m. – Ryan McCormick, Trevor Cone, Zachery Pollo (a)2:31 p.m. – James Nicholas, Tyler Weaver (a), Riki Kawamoto2:42 p.m. – Austen Truslow, Harrison Ott, George Duangmanee