Players: U
37 indexed careers with a surname starting U.
| Player | Years | H | HR | K | Feats |
|---|---|---|---|---|---|
| TUTyler Uberstine | 2026–2026 | 0 | 0 | 2 | |
| 2009–2017 | 0 | 0 | 572 | 1 | |
| 2006–2015 | 1,149 | 235 | 0 | 3 | |
| BUBob Uhl | 1938–1940 | 0 | 0 | 0 | 1 |
| TUTed Uhlaender | 1965–1972 | 772 | 36 | 0 | 4 |
| GUGeorge Uhle | 1919–1936 | 393 | 9 | 1,135 | 6 |
| MUMiguel Ullola | 2026–2026 | 0 | 0 | 16 | |
| DUDutch Ulrich | 1925–1927 | 23 | 0 | 123 | |
| JUJim Umbarger | 1975–1978 | 0 | 0 | 244 | 1 |
| TUTom Umphlett | 1953–1955 | 285 | 6 | 0 | |
| PUPat Underwood | 1979–1983 | 0 | 0 | 188 | |
| TUTom Underwood | 1974–1984 | 18 | 0 | 948 | 2 |
| BUBob Unglaub | 1904–1910 | 554 | 5 | 0 | 1 |
| DUDel Unser | 1968–1982 | 1,344 | 87 | 0 | 5 |
| BUBill Upham | 1915–1918 | 6 | 0 | 54 | 1 |
| JUJohn Upham | 1967–1968 | 4 | 0 | 4 | 1 |
| CUCecil Upshaw | 1966–1975 | 12 | 1 | 323 | 1 |
| WUWillie Upshaw | 1978–1988 | 1,103 | 123 | 0 | 3 |
| 2007–2022 | 1,754 | 325 | 0 | 5 | |
| MUMelvin Upton | 2004–2016 | 1,260 | 164 | 0 | 10 |
| TUTom Upton | 1950–1952 | 118 | 2 | 0 | |
| BUBilly Urbanski | 1925–1937 | 791 | 19 | 0 | |
| 1995–2005 | 5 | 0 | 814 | 1 | |
| LULino Urdaneta | 2004–2007 | 0 | 0 | 0 | 1 |
| 2015–2025 | 11 | 0 | 669 | 4 | |
| WUWalbert Ureña | 2026–2026 | 0 | 0 | 142 | |
| 2016–2023 | 19 | 0 | 710 | 1 | |
| 2018–2026 | 428 | 63 | 0 | 3 | |
| 2020–2026 | 444 | 54 | 0 | 1 | |
| 2023–2026 | 0 | 0 | 205 | 1 | |
| JUJose Uribe | 1984–1993 | 738 | 19 | 0 | 3 |
| 2001–2016 | 1,568 | 199 | 0 | 2 | |
| 2019–2026 | 1 | 0 | 359 | ||
| JUJohn Urrea | 1977–1981 | 12 | 0 | 202 | 2 |
| GUGiovanny Urshela | 2015–2025 | 759 | 73 | 0 | 1 |
| BUBob Usher | 1946–1957 | 259 | 18 | 0 | |
| 2003–2018 | 1,885 | 259 | 0 | 7 |