Spain's Jon Rahm will make an early start to his bid to successfully defend his US Open title at Brookline with the first tee times confirmed.
Rahm, who won his first major at Torrey Pines last year with birdies on the final two holes, will tee off at 0718 local time (1218BST) on Thursday, alongside Open champion Collin Morikawa and 2021 US Amateur winner James Piot.
Rory McIlroy, who successfully defended his RBC Canadian Open title on Sunday, is also among the early starters from the 10th tee, the world number three joined by former Masters champion Hideki Matsuyama and Olympic gold medallist Xander Schauffele at 0740.
US PGA champion Justin Thomas tees off at 1314 local time (1814BST) alongside Viktor Hovland and Tony Finau, with England's Matt Fitzpatrick two groups behind in the company of Webb Simpson and Dustin Johnson.
Phil Mickelson, who needs to win the US Open to complete the career grand slam, gets his campaign under way at 1347 local time (1847BST) alongside Shane Lowry and Louis Oosthuizen.
Three-time winner Tiger Woods is not in the field after opting to give his body more time to recover ahead of the 150th Open Championship at St Andrews next month.
Woods was in obvious pain from the leg he almost lost in a car accident in February last year before withdrawing from the US PGA Championship following a third round of 79.
US Open first round tee times in full (BST)
1st hole
1145: Michael Thorbjornsen, Erik Barnes, Matt McCarty
1156: Matthew NeSmith, Patrick Rodgers, Travis Vick
1207: Troy Merritt, William Mouw, Andrew Putnam
1218: Collin Morikawa, James Piot, Jon Rahm
1229: Jordan Spieth, Adam Scott, Max Homa
1240: Billy Horschel, Patrick Cantlay, Daniel Berger
1251: Harold Varner III, Sebastian Munoz, Alex Noren
1302: Joaquin Niemann, Cameron Young, Will Zalatoris
1313: Adam Schenk, Stewart Hagestad, Grayson Murray
1324: Guido Migliozzi, Branden Grace, Mackenzie Hughes
1335: Beau Hossler, Kalle Samooja, Satoshi Kodaira
1346: Richard Mansell, Tomoyasu Sugiyama, Roger Sloan
1357: Caleb Manuel, Keith Greene, Ben Silverman
1730: Kevin Chappell, Chase Seiffert, Andrew Novak
1741: Thorbjorn Olesen, Brian Stuard, Nick Hardy
1752: Sam Horsfield, Cameron Tringale, Shaun Norris
1803: Sungjae Im, Mito Pereira, Erik van Rooyen
1814: Justin Thomas, Viktor Hovland, Tony Finau
1825: Joohyung Kim, Seamus Power, Min Woo Lee
1836: Matt Fitzpatrick, Webb Simpson, Dustin Johnson
1847: Phil Mickelson, Shane Lowry, Louis Oosthuizen
1858: Danny Lee, Keita Nakajima, Nick Taylor
1909: Jim Furyk, Nick Dunlap, Adam Hadwin
1920: Richard Bland, Rikuya Hoshino, Ryan Fox
1931: Jonas Blixt, Bo Hoag, Todd Sinnott
1942: Isaiah Salinda, Sean Jacklin, Charles Reiter
10th Hole
1145: Fran Quinn, Callum Tarren, Hayden Buckley
1156: Kurt Kitayama, Denny McCarthy, Sam Bennett
1207: Wyndham Clark, Brandon Matthews, Wil Besseling
1218: David Lingmerth, Sepp Straka, Si Woo Kim
1229: Scott Stallings, Davis Riley, Victor Perez
1240: Rory McIlroy, Hideki Matsuyama, Xander Schauffele
1251: Kevin Kisner, Russell Henley, Brian Harman
1302: Keegan Bradley, Marc Leishman, Aaron Wise
1313: Francesco Molinari, Laird Shepherd, Stewart Cink
1324: Marcel Schneider, Chan Kim, Joseph Bramlett
1335: Lanto Griffin, Joel Dahmen, Jinichiro Kozuma
1346: Chris Gotterup, Fred Biondi, Harry Hall
1357: Chris Naegel, Andrew Beckler, Luke Gannon
1730: Jed Morgan, Taylor Montgomery, Sean Crocker
1741: Maxwell Moldovan, Yannik Paul, MJ Daffue
1752: Talor Gooch, Adri Arnaus, Tom Hoge
1803: Kevin Na, Sergio Garcia, Tyrrell Hatton
1814: Sam Burns, Abraham Ancer, Thomas Pieters
1825: Brooks Koepka, Cameron Smith, Scottie Scheffler
1836: Luke List, Austin Greaser, Corey Conners
1847: Gary Woodland, Justin Rose, Bryson DeChambeau
1858: K.H. Lee, Tommy Fleetwood, Patrick Reed
1909: Jason Kokrak, Harris English, Lucas Herbert
1920: Sam Stevens, Ben Lorenz, Davis Shore
1931: Daijiro Izumida, Adrien Dumont de Chassart, Sebastian Soderberg
1942: Ryan Gerard, Brady Calkins, Jesse Mueller
