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Welcome to the 2019-2020 Diamond Bar/Rowland NJB Winter League!

Please review the following information for the upcoming season.

About NJB

National Junior Basketball is a nonprofit organization that was founded in 1984 by Dennis Murphy, Jr. As a coach at Garden Grove High School in Orange County, California, Murphy had the vision of creating a youth basketball league based on sportsmanship and player development.

NJB has blossomed into a national youth league with participants in 4 states: California, Hawaii, Arizona and Nevada. For those in K-1st grade a Rookie League is provided that stresses the fundamentals of the game and provides tools for personal growth. The core of the organization is centered on the Divisional Play Program that is open for all boys and girls who wish to participate and are in 2nd through 8th grade. For individuals with an advanced skill set, the All-Net and BYT Programs acts as a supplement to the Divisional Program. The program provides additional training to prepare them for high school basketball in the future.

The High School League offers competition and skill training for players in grades 9-12 who did not make their high school team or looking for off-season play.

Our Mission

To inspire our youth; regardless of race, color, creed, or national origin. To practice the ideals of health, citizenship and character. To implant the game elements of safety, sanity, and intelligent supervision; and to keep the welfare of the player first, foremost, and entirely free of adult lust for glory. To emphasize teamwork for all participants.

Everyone is a winner at NJB!

Let us know if you have any questions. Diamond Bar / Rowland NJB

2020 Spring Season

Calling all 2nd-8th graders...registration is open for our Spring Season!  Also, BYT is available if you would like to bring your team.  Sign up today!  

Click HERE for more information


►December 8 Week 1 OPENING DAY
►December 15 Week 2
►December 22 Week 3
►December 23-January 3 Christmas Break
►January 5 Week 4
►January 12 Week 5
►January 19 Week 6
►January 26 Week 7
►February 2 Week 8 LEAGUE TOURNAMENT
►February 9 Week 9 LEAGUE TOURNAMENT
February 16 Rookie Tournament - Grades K-1
February 16 Champion Series - Option 1
February 22-23 Division 4 Tournament - Grade 2
February 23 Championship Series - Option 2

All Star Competition

All Star teams can begin practice on Jan 1st
February 24-27 Warm up Games - Boys Grades 4, 6, 8; Girls Grades 6, 8
February 29 - March 1 Mikasa Boys & Girls Grades 6, 8 & Boys Grade 4 All Star Tournaments
March 2-5 Warm Up Games- Boys Grades 3, 5, 7 & Girls Grade 4
March 7-8 Girls Grade 4 & Boys Grade 3, 5, 7 All Star Tournaments
March 7-8 Mikasa National All Star Tournament- Boys & Girls Grades 6 & 8 Level 1
March 14-15 Invitational Tournaments - Boys Grades 3, 5, 7
March 14-15 Open Tournament - Boys Grades 4, 6, 8
March 21-22 Score National All Star Tournament - Boys & Girls Grade 4; Boys & Girls Grade 6 & 8 Level 2

Players must be in the proper grade for competition.  Members can play up a grade.  The age cut-off for All Stars players is May 1st.  

Welcome to our 2022-2023 basketball season!
We are excited to share our 38th year of serving our community through basketball with you. 

NJB Headquarters
180 E. Main St. Suite 105
Tustin, CA 92780