| | Last Name | First Name | City | | Division | | Grade | | Team | | Returnee |
| | Jafari | Kean | Chino Hills | | Boys Division 1 | | 8 | | B1-4 | | YES |
| | Jenkins | Drew | Chino Hills | | Boys Division 1 | | 8 | | B1-5 | | YES |
| | Jerrett | Adam | Chino Hills | | Boys Division 1 | | 7 | | B1-7 | | YES |
| | Johannsen | Austin | Chino Hills | | Boys Division 2 | | 6 | | B2-5 | | YES |
| | Johannsen | Dane | Chino Hills | | Boys Division 3 | | 2 | | B3-10 | | YES |
| | Jones | Hannah | Chino Hills | | Rookie League I | | 2 | | R1-5 | | NO |
| | Jones | Malcolm | Chino Hills | | Boys Division 2 | | 5 | | B2-14 | | YES |
| | Juarez | Andrew | Chino Hills | | Boys Division 1 | | 7 | | B1-1 | | NO |