| Player | Pos | Seasons | Born | Birthplace | |
| Chuck Jackson | 3B/OF | 1987-88 | Mar 19, 1963 | Seattle | WA |
| Mike Jackson | P | 2001 | Dec 22, 1964 | Houston | TX |
| Sonny Jackson | SS | 1963-67 | Jul 9, 1944 | Washington | DC |
| Chris James | OF | 1993 | Oct 4, 1962 | Rusk | TX |
| Josh James | P | 2018-21 | Mar 8, 1993 | Hollywood | FL |
| Jordan Jankowski | P | 2017 | May 17, 1989 | McMurray | PA |
| Al Javier | OF | 1976 | Feb 4, 1954 | San Pedro de Macoris | DR |
| Cristian Javier | P | 2020-21 | Mar 26, 1997 | Santo Domingo | DR |
| Stan Javier | OF | 1999 | Jan 9, 1964 | San Francisco de Macoris | DR |
| Jason Jennings | P | 2007 | Jul 17, 1978 | Dallas | TX |
| Charlton Jimerson | OF | 2005-06 | Sep 22, 1979 | San Leandro | CA |
| Chris Johnson | 3B | 2009-12 | Oct 1, 1984 | Naples | FL |
| Cliff Johnson | C/1B/OF | 1972-77 | Jul 22, 1947 | San Antonio | TX |
| Jerry Johnson | P | 1974 | Dec 3, 1943 | Miami | FL |
| Jonathan Johnson | P | 2003 | Jul 16, 1974 | La Grange | GA |
| Ken Johnson | P | 1962-65 | Jun 16, 1933 | West Palm Beach | FL |
| Randy Johnson | P | 1998 | Sep 10, 1963 | Walnut Creek | CA |
| Russ Johnson | 3B/2B | 1997-2000 | Feb 22, 1973 | Baton Rouge | LA |
| John Johnstone | P | 1996 | Nov 25, 1968 | Liverpool | NY |
| Chris C. Jones | OF | 1992 | Dec 16, 1965 | Utica | NY |
| Chris D. Jones | OF | 1985 | Jul 13, 1957 | Los Angeles | CA |
| Doug Jones | P | 1992-93 | Jun 24, 1957 | Covina | CA |
| Gordon Jones | P | 1964-65 | Apr 2, 1930 | Portland | OR |
| Jimmy Jones | P | 1991-92 | Apr 20, 1964 | Dallas | TX |
| Taylor Jones | DH/1B/OF | 2020-21 | Dec 6, 1993 | Kent | WA |
| Todd Jones | P | 1993-96 | Apr 24, 1968 | Marietta | GA |
| Jeff Juden | P | 1991, 1993 | Jan 19, 1971 | Salem | MA |
| Skip Jutze | C | 1973-76 | May 28, 1946 | Bayside | NY |