All division descriptions below are specific to the spring/summer season, which runs from April and May through July. The fall baseball seasons are structured differently than our spring/summer season.

The Babe Ruth League age chart for 2026 is at the bottom of this page. You may use this to see what your child's "league age" is for the 2026 season. This chart is for baseball only. It should not be used  to determine the softball league age.

Cal Ripken age divisions go from 4 through 12 year's old. Each division progresses to the next level of rules, culminating with the Majors division playing nearly full MLB rules.

T-Ball (6U)

This division is a mix of hitting off a tee and coach pitch. No scores and standings are kept. There are no tournaments in this division. All players who are first year players, 6 & under, should select this division for registration.

Rookie (8U)

This division is machine pitch, using the Blue Flame pitching machines. Scores and standings are kept. There are tournaments in this division. It's played on a 60' diamond. While there are no walks, leadoffs, or stealing, most of the other general baseball rules are used, though modified for the age of the players. 6 year old's who have already played at least one season of T-Ball should consider playing in this division.

The benefits of this division are the machines we use generally can miss high and low, but rarely, if ever, miss side to side. This means players are very unlikely to be hit by a pitched ball. Compared to the next division up, players in this division get about twice as many at bats per game and three times as many balls are put in play. The most player growth and skill development, throughout the course of a season,  happens in this division.

Minor (10U)

This is the first division with player pitch. There are walks and stealing is allowed. Being the first year or two players are pitching, walks, passed balls, wild pitches, and stolen bases, are how a majority of runs are scored in this division. It's played on a 60' diamond. Most MLB rules are followed in this division, with the exception of leadoffs and uncaught third strikes.

Major (12U)

This is the division where nearly all MLB rules are in play, although still modified slightly for the age. The diamond expands to 70', with pitching at 50'. This division is where we introduce leadoffs and uncaught third strikes to the rules. There will likely be interleague play within this division. These games have historically been played in Elizabeth vs Pioneer teams. Most, if not all, regular season games will be played on weeknights. These will generally be doubleheaders.

Playing Up

A significant number of parents desire their kids to "play up" to a higher division, thinking there will be more skill and development growth opportunities. The only division where this has clearly shown to be the case is playing up to Rookie, while still being eligible for T-Ball. While some players are essentially forced to play up, mainly due to being on a team where some of the players are a year older and they must play in the older division, free agents, or those not returning to their previous team, must attend the assessments and be drafted by a team in the next division up from where the player is eligible. The rules for each age group are designed for the maximum growth and development for the vast majority for those age players.

Babe Ruth divisions are for those 13 and older. The game is played on a full-size, 90' diamond and play nearly twice the number of total games as Cal Ripken divisions, with largely MLB rules.  Lineups of 9 or 10 are used, with bench players as subs. Entire lineups are not batted and minimum playing time rules are not as generous as the Cal Ripken divisions. These divisions play doubleheaders often, whether on weeknights or Saturdays. Half or more of the schedule will be against outside teams. We aim to have half of all games at our home fields. Other teams/leagues which we play are generally in the greater metro area, but can be as far as northern Colorado, but usually only for the 18U division. 

13-16 Division (14U and 16U)

14U teams will play other 14U teams within interleague play, as 16U will play other 16U teams. When playing within the league,  teams will play 14U and 16U teams, to maximize the variaty of opponents within league play. Interleague games for each the 14U and 16U divisions will usually be only against those age groups.

16-18

They will play interleague games against other Centennial 16-18 teams,  Babe Ruth leagues,  high school varsity teams, and/or will play in 18U tournaments throughout the season. The outside games and tournaments could be through CCB, Legion, or other independant teams.