Mickelson arrives at Winged Foot looking to complete the career Grand Slam after six runner-up finishes in the one major that has eluded him, the U.S. Open. The left-hander did register his 44th PGA Tour victory in the 2019 AT&T Pebble Beach Pro-Am, his fifth title at the event. Mickelson's last major title came in 2013 when he shot a final-round 66 to claim The Open Championship at Muirfield. He also owns three Masters victories, in 2004, 2006 and 2010, and he won the PGA Championship in 2005 at Baltusrol Golf Club in Springfield, N.J. A 2012 World Golf Hall of Fame inductee, Mickelson has 51 worldwide wins. His only USGA title came in the 1990 U.S. Amateur at Cherry Hills Country Club outside of Denver over fellow San Diegan Manny Zerman. He represented the USA in the 1989 and 1991 Walker Cup Match and is a three-time NCAA individual champion. As a professional, he has competed on 12 USA Ryder Cup and 12 Presidents Cup teams.
| Year | Site | Scores | To Par | Finish |
| 2020 | Winged Foot Golf Club (West Course) | 79-74 | +13 | MC |
| 2019 | Pebble Beach Golf Links | 72-69-75-72-288 | +4 | T-52 |
| 2018 | Shinnecock Hills Golf Club | 77-69-81-69--296 | +16 | T-48 |
| 2016 | Oakmont Country Club | 74-73 | +7 | MC |
| 2015 | Chambers Bay | 69-74-77-73--293 | +13 | T-64 |
| 2014 | Pinehurst Resort & C.C. (Course No. 2) | 70-73-72-72--287 | +7 | T-28 |
| 2013 | Merion Golf Club | 67-70-72-74--283 | +3 | T-2 |
| 2012 | The Olympic Club | 76-71-71-78--296 | +16 | T-65 |
| 2011 | Congressional Country Club | 74-69-77-71--291 | +7 | T-54 |
| 2010 | Pebble Beach Golf Links | 75-66-73-73--287 | +3 | T-4 |
| 2009 | Bethpage State Park (Black Course) | 69-70-69-70--278 | -2 | T-2 |
| 2008 | Torrey Pines (South Course) | 71-75-76-68--290 | +6 | T-18 |
| 2007 | Oakmont Country Club | 74-77 | +11 | MC |
| 2006 | Winged Foot Golf Club (West Course) | 70-73-69-74--286 | +6 | T-2 |
| 2005 | Pinehurst Resort & C.C. (Course No. 2) | 69-77-72-74--292 | +12 | T-33 |
| 2004 | Shinnecock Hills Golf Club | 68-66-73-71--278 | -2 | 2 |
| 2003 | Olympia Fields Country Club | 70-70-75-74--289 | +9 | T-55 |
| 2002 | Bethpage State Park (Black Course) | 70-73-67-70--280 | E | 2 |
| 2001 | Southern Hills Country Club | 70-69-68-75--282 | +2 | T-7 |
| 2000 | Pebble Beach Golf Links | 71-73-73-76--293 | +9 | T-16 |
| 1999 | Pinehurst Resort & C.C. (Course No. 2) | 67-70-73-70--280 | E | 2 |
| 1998 | The Olympic Club | 71-73-74-70--288 | +8 | T-10 |
| 1997 | Congressional Country Club | 75-68-73-74--290 | +10 | T-43 |
| 1996 | Oakland Hills C.C. (South Course) | 76-71-73-76--296 | +16 | T-94 |
| 1995 | Shinnecock Hills Golf Club | 68-72-70-74--284 | +4 | T-4 |
| 1994 | Oakmont Country Club | 75-70-73-79--297 | +13 | T-47 |
| 1992 | Pebble Beach Golf Links | 68-81 | +5 | MC |
| 1991 | Hazeltine National Golf Club | 73-72-80-75--300 | +12 | T-55 |
| 1990 | Medinah Country Club (No. 3) | 74-71-71-72--288 | E | T-29 |