| Player | POS | Team | NUM | Height | Weight | DOB |
|---|---|---|---|---|---|---|
| Jackson, Alex | C | BAL | 70 | 6'1" | 238 lbs | Dec 25, 1995 |
| Jackson, Jeremiah | 2B | BAL | 82 | 5'11" | 165 lbs | Mar 26, 2000 |
| Jackson, Luke | RP | SEA | 77 | 6'2" | 210 lbs | Aug 24, 1991 |
| Jacob, Alek | RP | SD | 37 | 6'3" | 190 lbs | Jun 16, 1998 |
| Jameson, Drey | RP | AZ | 99 | 6'0" | 165 lbs | Aug 17, 1997 |
| Jansen, Danny | C | MIL | 33 | 6'1" | 240 lbs | Apr 15, 1995 |
| Jansen, Kenley | RP | LAA | 74 | 6'5" | 265 lbs | Sep 30, 1987 |
| Jarvis, Bryce | RP | AZ | 40 | 6'2" | 195 lbs | Dec 26, 1997 |
| Javier, Cristian | SP | HOU | 53 | 6'1" | 210 lbs | Mar 26, 1997 |
| Jax, Griffin | RP | TB | 22 | 6'2" | 195 lbs | Nov 22, 1994 |
| Jeffers, Ryan | C | MIN | 27 | 6'3" | 235 lbs | Jun 3, 1997 |
| Jensen, Carter | C | KC | 22 | 6'0" | 210 lbs | Jul 3, 2003 |
| Jimenez, Joe | RP | ATL | 77 | 6'3" | 277 lbs | Jan 17, 1995 |
| Jobe, Jackson | SP | DET | 21 | 6'2" | 190 lbs | Jul 30, 2002 |
| Johnson, Bryce | CF | SD | 29 | 6'0" | 195 lbs | Oct 27, 1995 |
| Johnson, Daniel | CF | BAL | 56 | 5'10" | 200 lbs | Jul 11, 1995 |
| Johnson, Pierce | RP | ATL | 38 | 6'2" | 202 lbs | May 10, 1991 |
| Johnson, Ryan | SP | LAA | 32 | 6'6" | 215 lbs | Aug 5, 2002 |
| Johnson, Seth | RP | PHI | 51 | 6'1" | 205 lbs | Sep 19, 1998 |
| Johnston, Troy | RF | MIA | 75 | 5'11" | 205 lbs | Jun 22, 1997 |
| Jones, Jahmai | RF | DET | 18 | 5'10" | 210 lbs | Aug 4, 1997 |
| Jones, Jared | SP | PIT | 37 | 6'0" | 190 lbs | Aug 6, 2001 |
| Jones, Nolan | RF | CLE | 22 | 6'5" | 195 lbs | May 7, 1998 |
| Joyce, Ben | RP | LAA | 44 | 6'5" | 225 lbs | Sep 17, 2000 |
| Judge, Aaron | RF | NYY | 99 | 6'7" | 282 lbs | Apr 26, 1992 |
| Julien, Edouard | 2B | MIN | 47 | 6'0" | 195 lbs | Apr 30, 1999 |
| Jung, Jace | 3B | DET | 17 | 6'0" | 205 lbs | Oct 4, 2000 |
| Jung, Josh | 3B | TEX | 6 | 6'1" | 214 lbs | Feb 12, 1998 |
| Junis, Jakob | RP | CLE | 16 | 6'3" | 238 lbs | Sep 16, 1992 |
| Junk, Janson | SP | MIA | 26 | 6'2" | 197 lbs | Jan 15, 1996 |






