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| Name | Pos | Team | Age | DOB | POB | Nationality | Bats | Throws | Height | Weight | Salary |
| Uchida, Hidekazu | MR | Free Agent | 30 | 07/30/1986 | Niigata | JPN | Right | Left | 6' 1" | 212 lbs | - |
| Uchida, Kan | C | Free Agent | 17 | 06/17/1999 | Kaga | JPN | Right | Right | 6' 2" | 225 lbs | - |
| Uchida, Katsumi | CF | Saitama Seibu Lions | 21 | 07/27/1995 | Masaki | JPN | Right | Right | 6' 0" | 205 lbs | - |
| Uchida, Keitaro | 2B | Hokkaido Nippon-Ham Fighters | 24 | 08/25/1992 | Ina | JPN | Right | Right | 5' 9" | 185 lbs | - |
| Uchida, Magobei | 3B | Free Agent | 26 | 10/11/1990 | Tokyo | JPN | Right | Right | 6' 0" | 205 lbs | - |
| Uchida, Naonobu | LF | Saitama Seibu Lions | 25 | 12/27/1991 | Tokyo | JPN | Switch | Right | 6' 3" | 155 lbs | - |
| Uchida, Nobuhisa | RF | Free Agent | 29 | 10/25/1987 | Tachikawa | JPN | Left | Right | 6' 0" | 211 lbs | - |
| Uchida, Shigochiyo | CF | Free Agent | 20 | 06/27/1996 | Fukushima | JPN | Right | Right | 5' 9" | 185 lbs | - |
| Uchida, Takahashi | SP | Free Agent | 22 | 04/18/1994 | Sendai | JPN | Left | Left | 5' 10" | 210 lbs | - |
| Uchiyama, Kitahachi | LF | Tokyo Yakult Swallows | 29 | 09/18/1987 | Kyoto | JPN | Left | Right | 6' 1" | 152 lbs | - |
| Uchiyama, Kosho | LF | Free Agent | 25 | 09/09/1991 | Joetsu | JPN | Right | Right | 6' 0" | 195 lbs | - |
| Uchiyama, Nakamaro | SP | Tokyo Yakult Swallows | 30 | 09/30/1986 | Tenryu | JPN | Left | Left | 6' 2" | 210 lbs | - |
| Uchiyama, Tokuma | RF | Free Agent | 24 | 03/09/1992 | Matsudo | JPN | Left | Left | 6' 0" | 210 lbs | - |
| Ueda, Akihiro | MR | Free Agent | 37 | 10/02/1979 | Kagoshima | JPN | Left | Left | 6' 0" | 180 lbs | - |
| Ueda, Kaoru | SP | Free Agent | 37 | 11/18/1979 | Yamaguchi | JPN | Right | Right | 6' 2" | 203 lbs | - |
| Ueda, Kazutoshi | SS | Free Agent | 33 | 08/02/1983 | Kawagoe | JPN | Right | Right | 6' 0" | 208 lbs | - |
| Ueda, Masayuki | 1B | Yokohama Bay Stars | 31 | 01/23/1985 | Kamogawa | JPN | Left | Left | 6' 5" | 215 lbs | - |
| Uemura, Matsusuke | MR | Tokyo Yakult Swallows | 27 | 08/15/1989 | Daigo | JPN | Right | Right | 6' 0" | 193 lbs | - |
| Uemura, Matsuyo | SP | Free Agent | 29 | 03/22/1987 | Obu | JPN | Right | Right | 6' 0" | 185 lbs | - |
| Ueno, Kiyoshi | RF | Free Agent | 31 | 06/21/1985 | Nagoya | JPN | Right | Right | 6' 0" | 171 lbs | - |
| Ueno, Ryosei | LF | Chunichi Dragons | 23 | 05/27/1993 | Sendai | JPN | Left | Right | 6' 1" | 180 lbs | - |
| Uenohara, Yoshinobu | MR | Free Agent | 18 | 11/24/1998 | Kumamoto | JPN | Right | Right | 6' 3" | 200 lbs | - |
| Umaba, Ichiro | 2B | Free Agent | 35 | 10/09/1981 | Sapporo | JPN | Switch | Right | 5' 11" | 194 lbs | - |
| Umaba, Noriaki | MR | Free Agent | 20 | 10/11/1996 | Fuchu | JPN | Right | Right | 6' 2" | 180 lbs | - |
