It was James J. Corbett's visit to the young Milwaukee Press Club in 1898 that started a tradition that lives on to this day – the signing of autograph plaques.
| Last Name | First Name | Date Signed |
|---|---|---|
| Uihlein | Robert A., Jr. | 25/04/1965 |
| Uihlein | Erwin C. | December 6, 1964 |
| Ulichny | Barbara L. | August 4, 2004 |
| Umhoefer | David | 25/06/2008 |
| Unidentified 1 | November 4, 1989 | |
| Unidentified 10 | 25/04/1982 | |
| Unidentified 11 | October 11, 2000 | |
| Unidentified 12 | June 4, 2000 | |
| Unidentified 13 | June 4, 2000 | |
| Unidentified 16 | 16/07/2001 | |
| Unidentified 2 | 26/09/1980 | |
| Unidentified 3 | 25/10/1984 | |
| Unidentified 4 | September 4, 1985 | |
| Unidentified 5 | June 6, 1985 | |
| Unidentified 6 | June 3, 1987 | |
| Unidentified 7 | November 10, 1985 | |
| Unidentified 8 | 24/10/1984 | |
| Unidentified 9 | 14/06/1978 | |
| Usinger | Debra | September 9, 2004 |
| Usinger | Fritz | September 9, 2009 |