30 indexed careers with a surname starting U.
| Player | Years | H | HR | K | Feats |
|---|---|---|---|---|---|
| Koji Uehara | 2009–2017 | 0 | 0 | 572 | |
| Dan Uggla | 2006–2015 | 1,149 | 235 | 0 | |
| Ted Uhlaender | 1965–1972 | 772 | 36 | 0 | |
| George Uhle | 1919–1936 | 394 | 9 | 1,143 | 2 |
| Maury Uhler | 1914–1914 | 12 | 0 | 0 | 1 |
| Dutch Ulrich | 1925–1927 | 23 | 0 | 123 | 1 |
| Jim Umbarger | 1975–1978 | 0 | 0 | 244 | |
| Tom Umphlett | 1953–1955 | 285 | 6 | 0 | |
| Pat Underwood | 1979–1983 | 0 | 0 | 188 | |
| Tom Underwood | 1974–1984 | 18 | 0 | 948 | |
| Bob Unglaub | 1904–1910 | 555 | 4 | 0 | 2 |
| Del Unser | 1968–1982 | 1,344 | 87 | 0 | |
| Cecil Upshaw | 1966–1975 | 12 | 1 | 323 | |
| Willie Upshaw | 1978–1988 | 1,103 | 123 | 0 | |
| Justin Upton | 2007–2022 | 1,754 | 325 | 0 | 2 |
| Melvin Upton | 2004–2016 | 1,260 | 164 | 0 | 2 |
| Tom Upton | 1950–1952 | 118 | 2 | 0 | 1 |
| Billy Urbanski | 1925–1937 | 791 | 19 | 0 | |
| Ugueth Urbina | 1995–2005 | 5 | 0 | 814 | 1 |
| Jose Urena | 2015–2025 | 11 | 0 | 669 | |
| Julio Urias | 2016–2023 | 19 | 0 | 710 | |
| Luis Urias | 2018–2026 | 428 | 63 | 0 | 2 |
| Ramon Urias | 2020–2026 | 442 | 53 | 0 | 1 |
| Jose Uribe | 1984–1993 | 738 | 19 | 0 | |
| Juan Uribe | 2001–2016 | 1,568 | 199 | 0 | 1 |
| Jose Urquidy | 2019–2026 | 1 | 0 | 348 | |
| John Urrea | 1977–1981 | 12 | 0 | 202 | |
| Giovanny Urshela | 2015–2025 | 759 | 73 | 0 | |
| Bob Usher | 1946–1957 | 259 | 18 | 0 | 1 |
| Chase Utley | 2003–2018 | 1,885 | 259 | 0 | 2 |