MLB Spieler — U
43 MLB-Baseballspieler mit Nachnamen, die mit U beginnen.
- Uceta, Edwin 2021–
- Uecker, Bob 1962–1967
- Uehara, Koji 2009–2017
- Uggla, Dan 2006–2015
- Ugueto, Luis 2002–2003
- Uhalt, Frenchy 1934–1934
- Uhlaender, Ted 1965–1972
- Uhle, George 1919–1936
- Ujdur, Jerry 1980–1984
- Ulrich, Frank 1925–1927
- Umbarger, Jim 1975–1978
- Umbricht, Jim 1959–1963
- Umphlett, Tom 1953–1955
- Underwood, Duane 2018–
- Underwood, Pat 1979–1983
- Underwood, Tom 1974–1984
- Unglaub, Bob 1904–1910
- Unroe, Tim 1995–2000
- Unser, Al 1942–1945
- Unser, Del 1968–1982
- Upshaw, Cecil 1966–1975
- Upshaw, Willie 1978–1988
- Upton, B. J. 2004–2016
- Upton, Justin 2007–2022
- Upton, Tom 1950–1952
- Urban, Jack 1957–1959
- Urban, Luke 1927–1928
- Urbani, Tom 1993–1996
- Urbanski, Billy 1931–1937
- Urbina, Ugueth 1995–2005
- Urena, Jose 2015–
- Urena, Richard 2017–2019
- Urias, Julio 2016–
- Urias, Luis 2018–
- Urias, Ramon 2020–
- Uribe, Abner 2023–
- Uribe, Jose 1984–1993
- Uribe, Juan 2001–2016
- Urquidy, Jose 2019–
- Urrea, John 1977–1981
- Urshela, Gio 2015–
- Usher, Bob 1946–1957
- Utley, Chase 2003–2018