The US Open 2023 is set to tee off on Thursday, June 15, and conclude on June 18. The four-day event is held at the Los Angles Country Club, North Course in Los Angeles, California. The first and second-round tee times and groupings for the US Open are out now.The third major of the year, the US Open will have some of the biggest names in the golf world teeing up at LACC. The first round of the tournament will tee off at 9:45 am. The grouping of Omar Morales, Deon Germishuys and Jacob Solomon will take the first tee. The groups of Ryan Gerard-Yuto Katsuragawa-Michael Brennan and Hayden Buckley-Adam Svensson-Pablo Larrazabal will follow suit.US Open 2023 round 1 tee times and groupingsThe US Open 2023 round 1 has some exciting groupings on paper. British Open champ Cameron Smith, US Amateur champ Sam Bennett and defending US Open champ Matt Fitzpatrick is one to watch out for. Meanwhile, LIV Golf star and PGA Championship winner Brooks Koepka will be playing alongside Hideki Matsuyama and Rory McIlroy.PGA TOUR@PGATOURGroups are out for @USOpenGolf!🏌️ Morikawa, Homa, Scheffler Koepka, Matsuyama, McIlroy🏌️Schauffele, Hovland, Rahm Finau, Spieth, Cantlay🏌️Rose, Fowler, Day Lowry, Thomas, Fleetwood🏌️ T. Kim, Theegala, Young Smith, Bennett, Fitzpatrick2943264Groups are out for @USOpenGolf!🏌️ Morikawa, Homa, Scheffler⛳ Koepka, Matsuyama, McIlroy🏌️Schauffele, Hovland, Rahm⛳ Finau, Spieth, Cantlay🏌️Rose, Fowler, Day⛳ Lowry, Thomas, Fleetwood🏌️ T. Kim, Theegala, Young⛳ Smith, Bennett, FitzpatrickScottie Scheffler is grouped with Collin Morikawa and Max Homa, while Phil Mickelson will tee off with Padraig Harrington and Keegan Bradley. It is pertinent to note that the pairings involving LIV players and PGA Tour stars will be more interesting to watch owing to the recent LIV Golf-PGA Tour merger news development.Complete first-round tee times for the 123rd US Open (All times ET):1st tee9:45 am - Omar Morales (a), Deon Germishuys, Jacob Solomon9:56 am - Ryan Gerard, Yuto Katsuragawa, Michael Brennan (a)10:07 am - Hayden Buckley, Adam Svensson, Pablo Larrazabal10:18 am - Carson Young, Dylan Wu, Roger Sloan10:29 am - Ryo Ishikawa, Kevin Streelman, Matthieu Pavon10:40 am - Shane Lowry, Justin Thomas, Tommy Fleetwood10:51 am - Sungjae Im, K.H. Lee, J.T. Poston11:02 am - Gary Woodland, Adam Scott, Corey Conners11:13 am - Collin Morikawa, Max Homa, Scottie Scheffler11:24 am - Denny McCarthy, Joel Dahmen, Adam Hadwin11:35 am - Matthew McClean (a), Seamus Power, Ryan Fox11:46 am - Mac Meissner, Barclay Brown (a), Gunn Charoenkul11:57 am - Alexander Yang (a), Jesse Schutte, Andy Svoboda3:15 pm - Brent Grant, Vincent Norrman, Charley Hoffman3:26 pm - Simon Forsstrom, Carlos Ortiz, Maxwell Moldovan (a)3:37 pm - Eric Cole, Thriston Lawrence, Adam Schenk3:48 pm - Luke List, Wilco Nienaber, Alejandro Del Rey3:59 pm - Adrian Meronk, Harris English, Joaquin Niemann4:10 pm - Alex Noren, Wyndham Clark, Austin Eckroat4:21 pm - Kurt Kitayama, Cam Davis, Russell Henley4:32 pm - Cameron Smith, Sam Bennett, Matt Fitzpatrick4:43 pm - Billy Horschel, Chris Kirk, Brian Harman4:54 pm - Brooks Koepka, Hideki Matsuyama, Rory McIlroy5:05 pm - Sebastian Munoz, Nick Taylor, Taylor Montgomery5:16 pm - Olin Browne Jr., David Puig, Karl Vilips (a)5:27 pm - Corey Pereira, Isaac Simmons (a), J.J. Grey10th tee9:45 am - Berry Henson, Ryutaro Nagano, Hank Lebioda9:56 am - Michael Kim, Jordan Smith, Wenyi Ding (a)10:07 am - Scott Stallings, Preston Summerhays (a), Lucas Herbert10:18 am - Ryan Armour, Jens Dantorp, Patrick Rodgers10:29 am - Thomas Pieters, Gordon Sargent (a), Aaron Wise10:40 am - Bryson DeChambeau, Tyrrell Hatton, Francesco Molinari10:51 am - Sergio Garcia, Tom Hoge, Sepp Straka11:02 am - Jason Day, Rickie Fowler, Justin Rose11:13 am - Si Woo Kim, Matt Kuchar, Patrick Reed11:24 am - Viktor Hovland, Jon Rahm, Xander Schauffele11:35 am - Stewart Cink, Martin Kaymer, Michael Thorbjornsen (a)11:46 am - Paul Barjon, David Horsey, Brendan Valdez (a)11:57 am - Bastien Amat (a), Jordan Gumberg, Kyle Mueller3:15 pm - Nico Echavarria, Ross Fisher, Paul Haley II3:26 pm - Nick Dunlap (a), Nick Hardy, Sam Stevens3:37 pm - Romain Langasque, Taylor Pendrith, Aldrich Potgieter (a)3:48 pm - Abraham Ancer, Victor Perez, Andrew Putnam3:59 pm - Keegan Bradley, Padraig Harrington, Phil Mickelson4:10 pm - Emiliano Grillo, Mateo Fernandez de Oliveira (a), Mito Pereira4:21 pm - Tom Kim, Sahith Theegala, Cameron Young4:32 pm - Sam Burns, Dustin Johnson, Keith Mitchell4:43 pm - Patrick Cantlay, Tony Finau, Jordan Spieth4:54 pm - Min Woo Lee, Justin Suh, Davis Thompson5:05 pm - Ben Carr (a), Mackenzie Hughes, Taylor Moore5:16 pm - Frankie Capan III, Patrick Cover, David Nyfjall (a)5:27 pm - Christian Cavaliere (a), Alex Schaake, Austen TruslowUS Open Day 2 tee times will be updated after Thursday's play.