U
- Jim Umbarger, P, 1977
- Tom Underwood, P, 1981-1983
- Woody Upchurch, P, 1935-1936
- Bill Upton, P, 1954
- Jack Urban, P, 1957-1958
Read more about this topic: Oakland Athletics All-time Roster
U
Read more about this topic: Oakland Athletics All-time Roster