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2024 Summer season starts on July 13 for all age divisions 6U-16U.


The COBA 2024 Summer season will begin Juli 13 to August 25!  Follow the link below to the registration program page.

Summer Registration Fees

Division Player Registration Intact Team Registration
Tee Ball (6U) $85 $500
Rookies (8U) $115 $900
Minors (10U) $155 $1400
Majors (12U) $155 $1500
Intermediate (14U) $155 $1600
Juniors (16U) $155 $1600


No longer accepting Intact Team requests for the Spring Season. Intact teams interested in participating in the upcoming Summer season, please submit your request using the link below. 

This is a request only. Space is limited and is subject to field availability. Upon acceptance, Coaches will receive an email with team payment and player registration information. Intact registration will begin after COBA open registration closes.

Intact Team Coaches/Managers will coordinate team payment and intact player registration.  See the Registration FAQ for more information about intact teams.


All head coaches and assistant coaches who plan on volunteering this Spring season will need to sign up for the Babe Ruth Coaches Membership.  Coaches will need to complete the following:

  • Babe Ruth Coaches Cert ($20, never expires)
  • Background Check and APS ($25, 2 years)

Use the link below to get started.


New to coaching in COBA? Checkout our Coaches Overview below and follow the link to the Coaches FAQ.


During registration, players have the option to request a specific coach.  Final player rosters are at the digression of the requested coach as well as subject to roster space availability by the league.  Please contact the coach prior to registration to eliminate any miscommunication.  Players who do not request a coach are subject to roster availability.  If roster spots are available, players will be assigned to a team through a draft process.  The leagues ability to accommodate interested players is based on the number of volunteers willing to take a team.  COBA is a 100% volunteer organization, we need your help to ensure that all players who want to play have a place to play.  Our volunteer coaches are vital to the community and we encourage everyone to consider volunteering!  Please contact a Board Member or Division Coordinator if interested in coaching.


COBA holds a regular season four times per year, winter, spring, summer, and fall.  Teams will play a round robin format where a typical season includes 12 scheduled games over a 6 week duration.  Games are held on Saturdays and Sundays with an occasional weekday game.  Team practice start 2-3 weeks prior to the start of the season.  Practice times and days are at the coaches discretion and are also subject to field availability. Typically coaches will hold a team practice twice per weekday in the late afternoon.  All games and practices are held in Mililani.  See field locations for details. 

  • Winter Season: January - March
  • Spring Season: April - June
  • Summer Season: July - August 
  • Fall Season: September - November


Our ability to accommodate all registered players is dependent on the number of coaches in each division, with that said your participation as a volunteer coach is vital to the success of our league.  Team managers and coaches are responsible for contacting parents, setting practice days, and all other team related business. Check out our Coaches FAQ for more info or contact your division coordinator on how to become a coach.