Horschel owns six PGA Tour victories, the latest coming in the WGC-Dell Technologies Match Play where he defeated 2013 U.S. Junior Amateur champion Scottie Scheffler, 2 and 1, in the 18-hole final. Horschel closed out the 2014 season by winning the BMW Championship and Tour Championship to claim the FedExCup title. Horschel shared the 36-hole lead with Phil Mickelson in the 2013 U.S. Open at Merion, where he tied for fourth. He was a member of the victorious 2007 USA Walker Cup Team. The former University of Florida standout also holds the USGA 18-hole scoring record, shooting a 60 at the Chaska (Minn.) Town Course in the first round of the 2006 U.S. Amateur. Horschel also represented the USA in the 2007 and 2008 Palmer Cups.
U.S. Open Record
| YEAR | SITE | SCORES | TO PAR | FINISH |
| 2021 | Torrey Pines Golf Course (South Course) | 74-75 | +7 | MC |
| 2020 | Winged Foot Golf Club (West Course) | 72-70-72-80--294 | +14 | T-38 |
| 2019 | Pebble Beach Golf Links | 73-70-71-70--284 | E | T-32 |
| 2017 | Erin Hills | 79-78 | +13 | MC |
| 2016 | Oakmont Country Club | 72-74-66-76--288 | +8 | T-32 |
| 2015 | Chambers Bay | 72-72-73-67--284 | +4 | T-25 |
| 2014 | Pinehurst Resort & C.C. (Course No. 2) | 75-68-73-70-286 | +6 | T-23 |
| 2013 | Merion Golf Club (East Course) | 72-67-72-74--285 | +5 | T-4 |
| 2006 | Winged Foot Golf Club (West Course) | 75-77 | +12 | MC |