| Division | Typical League Age* | Description |
| Challenger | 5-21 | The philosophy of this program is to provide the framework for mentally and physically challenged youth to enjoy the benefits of Little League and participate in an athletic environment structured to their abilities. Games are held on Sunday afternoons at the Dublin Sports Grounds. The season typically begins late March and runs through the end of May. |
| Tee Ball | 5-6 | Recreational, non-competitive teaching environment. Teams formed by League (no tryout required).Small fieldSoft safety ballNo pitching; ball hit from batting tee |
| Minors Farm | 7-8 | Recreational, non-competitive teaching environment. Teams formed by League (no tryout required).60-foot diamondSoft-core ballPitching machine |
| Minors A | 8-9 | Recreational, non-competitive teaching environment. Teams formed by League (no tryout required).60-foot diamondRegulation Little League baseballCombination coach and player pitching |
| Minors AA | 9-11 | Recreational, non-competitive teaching environment. All players must attend tryouts for evaluation.60-foot diamondRegulation Little League baseballRegular pitching |
| Minors AAA | 9-12 | Competitive teaching environment. All players must attend tryouts for evaluation.60-foot diamondRegulation Little League baseballRegular pitching |
| Majors | 10-12 | Highly competitive. Players in the Majors division continue on the same team through age 12. All players not who did not play in the Majors division during the prior year must attend tryouts for evaluation. |
| Junior 80s | 13-14 | Competitive teaching environment.80-foot diamondGames from Livermore to Danville |
| Junior Elite 80s | 13 | Highly competitive. All players must attend tryouts for evaluations.80-foot diamondGames within a 1-hour drive (e.g., Freemont & Tracy) |
| Junior 90s | 14 | Highly competitive. All players must attend tryouts for evaluations.90-foot diamondGames from Livermore to Danville |
| Seniors | 15-16 | Highly competitive. Games scheduled around High School baseball programs.Games from Livermore to Danville |
| Big League | 17-18 | Highly competitive. Games scheduled around High School baseball programs.Games from San Jose to Walnut Creek and Concord |
| *The age of a baseball player on April 30 of the current year is that player’s League Age for the current season. |