-No. 1,028 in World Amateur Golf Ranking®/WAGR®

-Competing in his sixth USGA championship and first U.S. Senior Amateur

-Has played in two U.S. Senior Opens (2015, 2016) and three U.S. Mid-Amateurs

-Won this year’s Florida State Golf Association Senior Amateur by three strokes over Paul Royak

-Claimed the 2020 Golf Ontario Senior Men’s Championship by two strokes

-Captured three Canadian Mid-Amateur and three Ontario Mid-Amateur titles

-Twice played in the PGA Tour’s RBC Canadian Open (2010, 2011)

-Inducted in Ontario Golf Hall of Fame in 2018

-Retired middle school teacher and boys’ and girls’ basketball coach in Toronto

Road to the Quarterfinals

-Shot 73-70–143 in stroke play to earn the No. 20 seed

-R64: Def. Dick Engel, 4 and 3

-R32: Def. Keith Smith, 3 and 2

-R16: Def. Daniel Russo, 5 and 3

-No. 2,153 in World Amateur Golf Ranking®/WAGR®

-Competing in his seventh USGA championship and third U.S. Senior Amateur

-Advanced to U.S. Senior Amateur quarterfinals in 2018 and Round of 64 in 2019

-Won the 2019 R&A Senior Amateur when he made a 5-foot birdie putt on third playoff hole

-Victorious in 2020 Southern California Senior Amateur and was runner-up this year

-Chosen 2018 Southern California Golf Association Senior Player of the Year

-Played college golf at the University of Arizona from 1980-83

-One of his Arizona teammates was John Ashworth, who founded the Ashworth golf apparel company

-Works as software engineer for an aerospace company

Road to the Quarterfinals

-Shot 72-75–147 in stroke play to earn the No. 58 seed

-R64: Def. Jeff Knox, 4 and 2

-R32: Def. Paul Jett, 5 and 4

-R16: Def. Lewis Stephenson, 3 and 2

-No. 294 in World Amateur Golf Ranking®/WAGR

-Competing in his 36th USGA championship and fourth U.S. Senior Amateur

-Rallied for a 1-up victory over 2013 U.S. Senior Amateur champion Doug Hanzel in Round of 16

-Defeated his U.S. Amateur Four-Ball partner and fellow Iowan Michael McCoy in Round of 32

-Advanced to match play in all four Senior Amateurs, including the Round of 16 in 2018

-Competed in one U.S. Senior Open, eight U.S. Amateurs and 15 U.S. Mid-Amateurs

-Won this year’s R&A Senior Amateur Championship, after losing in a three-hole playoff in 2019

-Captured the 2017 and 2019 Canadian Senior Amateur Championships

-Inducted into the Iowa Golf Hall of Fame in 2012

-Owns a sanitation and street equipment company

-Recovered from open-heart surgery 21 years ago

Road to the Quarterfinals

-Shot 74-71–145 in stroke play to earn No. 38 seed

-R64: Def. Randy Hicken, 3 and 2

-R32: Def. Michael McCoy, 19 holes

-R16: Def. Doug Hanzel, 1 up

-Not ranked in World Amateur Golf Ranking®/WAGR®

-Playing in his ninth USGA championship and first U.S. Senior Amateur

-Outlasted Joe Jaspers, 1 up, in his Round-of-16 match with a winning par on the 18th hole

-Competed in 2012 U.S. Senior Open at Indianwood Golf and Country Club, in Lake Orion, Mich.

-Has played in three U.S. Amateurs and three U.S. Mid-Amateurs

-1993 Michigan PGA Player of the Year before being reinstated as an amateur four years later

-Three-time club champion at Oakland Hills Country Club, the site of six U.S. Open Championships

-Member of 1982 NCAA Division II national championship team at Southwest Texas State (now Texas State)

-His son, Michael, is a pro rugby player for the Utah Warriors, and another son, Danny, was a pitcher on the Michigan State baseball team

-Gieselman, who works in sales for a steel company, goes by his middle name (Tom) instead of Walter

Road to the Quarterfinals

-Shot 76-70–146 in stroke play to earn No. 46 seed

-R64: Def. Randy Haag, 3 and 1

-R32: Def. Philip Mahone, 6 and 5

-R16: Def. Joe Jaspers, 1 up

-Not ranked in World Amateur Golf Ranking®/WAGR®

-Competing in his second U.S. Senior Amateur; advanced to match play in 2019

-One of four players who qualified for this championship on Oakland Hills Country Club’s North Course

-Won 2020 Golf Association of Michigan Mid-Amateur’s Senior Division

-Captured 2004 Horton Smith Championship at Detroit Golf Club

-Won a pair of Lansing Stroke Play and Lansing Match Play titles

-10-time club champion at Owosso Country Club, where he shot a competitive-low 62 last year

His sons, Nathan and Nick, have played in the 2006 U.S. Amateur and 2019 U.S. Mid-Amateur, respectively

-President of a plumbing and heating company that was founded in 1980

Road to the Quarterfinals

-Shot 71-70–141 in stroke play to earn No. 9 seed

-R64: Def. Terry Wamack, 5 and 3

-R32: Def. Brad Wayment, 1 up

-R16: Def. Jim Scorse, 4 and 3

-No. 4,752 in World Amateur Golf Ranking®/WAGR®

-Competing in his 22nd USGA championship and 11th U.S. Senior Amateur

-Won the 2015 U.S. Senior Amateur, defeating Tom Brandes, 5 and 3, in the final

-Has advanced to semifinals of this championship five times and has a 28-9 record in match play

-Low amateur in 2016 U.S. Senior Open, tying for 37th at Scioto Country Club

-Won The R&A Senior Amateur three times and the Canadian Senior Amateur twice

-He and Paul Simson are the lone players to win the U.S. Senior, The R&A Senior and Canadian Senior Amateurs

-Seven-time Golf Association of Philadelphia Senior Player of the Year

-Played golf at the University of Florida and later worked in real estate services and property management

Road to the Quarterfinals

-Shot 68-70–138 in stroke play to earn No. 2 seed

-R64: Def. Robert Nelson, 5 and 3

-R32: Def. Jim Muething, 6 and 5

-R16: Def. Eddie Hargett, 3 and 2

-No. 1,312 in World Amateur Golf Ranking®/WAGR®

-Competing in his 11th USGA championship and second U.S. Senior Amateur

-Low amateur in this year’s U.S. Senior Open, tying for 46th at Omaha (Neb.) Country Club

-Advanced to Round of 16 in 2019 U.S. Senior Amateur, losing to eventual champion Bob Royak

-Won last year’s Georgia Senior Match Play Championship and was runner-up in 2021

-Played in 1983 U.S. Amateur at North Shore C.C. in Glenview, Ill., where his caddie was Chris O’Donnell, now a film and TV actor

-A performance health coach who has trained PGA Tour players Stewart Cink and Roberto Castro

-Has also worked with LPGA Tour players, including Mariah Stackhouse and Dori Carter, and consulted college and high school teams

-His father, Lawson, was a longtime club professional

Road to the Quarterfinals

-Shot 73-73–146 in stroke play to earn No. 44 seed

-R64: Def. Casey Boyns, 4 and 3

-R32: Def. Bob Royak, 1 up

-R16: Def. Tim Peterson, 4 and 3

-No. 808 in World Amateur Golf Ranking®/WAGR®

-Playing in his eighth USGA championship and second U.S. Senior Amateur

-Defeated Jim Lehman in longest Round-of-16 match since 2016 (21 holes)

-In Round of 32, he beat Kory Frost, who had upset medalist Tim Hogarth

-Won Golfweek Senior National Match Play, defeating Scott Smith, 5 and 4, in the final on Aug. 13

-Played college golf at Georgia Southern University and Alexander City (Ala.) State Community College

-2016 U.S. Senior Open champion Gene Sauers was a college teammate

-Member of Georgia Southern Athletic Foundation Board

-Chief executive officer of an insurance firm

Road to the Quarterfinals

-Shot 72-73–145 in stroke play to earn No. 33 seed

-R64: Def. Titus Harris, 6 and 5

-R32: Def. Kory Frost, 3 and 1

-R16: Def. Jim Lehman, 21 holes