Welcome to the Official website for Chesterfield Baseball & Softball Association (CBSA)

Fall Baseball Mini Session
September 21 - October 16
  • Register a team Sept. 15 - Sept. 20.  Accepting Select and American Baseball Teams Ages 8U-14U.  2021 Age Levels. (Ex. if you had a 9U team this past spring your team would play 10U this fall and next spring)
    • NOTE: Any 14U players must be in 8th grade to play games.  STLCO rule.  ​
  • FREE
  • Every team gets up to 4 time slots (1 hour 30 minutes).   You can choose from 1) Practice  2) Scrimmage (you find another team and no umpires), 3) Game (with umpires).
  • Time slots will be 6pm and 8pm on weeknights and 10am, noon and 2pm on weekends.  
  • Register team first, then enter roster and INVITE players to register.  
    • When registering you can choose "A" Division for SELECT or "B" Division for AMERICAN 
  • Games will depend on number of teams registering for this session and age levels.
  • Will follow COVID-19 rules
Fall American League
Fall League Format (cancelled)
  • 7-Game Season: September 8 - mid October 2020
  • 8U Games (1 hr 15 min) Games played Monday - Fridays (6pm, 7:45pm), Saturdays - Sundays (9am, 10:45am, 12:30pm, 2:15pm, 4pm)
  • 9U-14U Games (1 hr 30 min) Games played Monday - Fridays (6pm, 8pm), Saturdays - Sundays (9am, 11am, 1pm, 3pm, 5pm)
  • Managers will be give 12 blackout dates to avoid conflicts
  • All league games played at Chesterfield
  • $775/Team
Eligibility - Play 2021 Age Levels
  • 8U (Machine Pitch) for players born 5/1/12 - 4/30/13
  • 9U for players born 5/1/11 - 4/30/12
  • 10U for players born 5/1/10 - 4/30/11
  • 11U for players born 5/1/09 - 4/30/10
  • 12U for players born 5/1/08 - 4/30/09
  • 13U for players born 5/1/07 - 4/30/08
  • 14U for players born 5/1/06 - 4/30/07
Looking For A Team?  Check out our discussion boards
Spring American League

The American League is for boys ages 8-14. This program is for recreational or competitive recreational players looking to build strong fundamentals.

Registration Information (2 steps)

1) Register the team Nov. 1st - Dec. 2nd.  No fee required.  As you register the team, you will input an expected roster.  Then you will "Invite" the parent who will get an email with a link to register.  Rosters can be edited and players added or removed as needed.

 2) Players register.  After registering the team, those expected roster players receive an email with a link to register.  Be sure to check SPAM or junk mail for the email.  Player fee is $145 and players should register by Jan. 31 (late fee of $25 after Jan. 31).

  • If a player DOES NOT have a team, they may register Dec. 1-Jan.. 31 and CBSA will try to find them a team. Player fee is $145/player.  We also encourage you to check the ads, or create your own, our American Baseball discussion boards
League Format
  • All league games played at Chesterfield
  • Practice times & locations are determined by the coach
8U Format
  • 12-Game Season: March 30th - June 30th
  • Machine pitch/1 umpire
  • Games played: Fridays (6pm, 7:30pm), Saturdays & Sundays (8am - 4pm), and Mondays (6pm, 7:30pm)
  • Games 1hr 20 min
  • 4 pre-season and 4 in-season practices at Chesterfield Valley Athletic Complex
9U-14U Format
  • 12-Game Season: late March - end June
  • Games played: Fridays (6pm, 8pm), Saturdays & Sundays (8am - 4pm), and Mondays (6pm, 8pm)
  • Games 1hr 40 min
  • 4 pre-season practices and 4 in-season practices (8U-10U only) at Chesterfield Valley Athletic Complex
2020 Eligibility
CBSA does not allow any player to be on more than one roster, regardless of age, division or league.
  • 8U (Machine Pitch) for players born 5/1/11 - 4/30/12
  • 9U for players born 5/1/10 - 4/30/09
  • 10U for players born 5/1/09- 4/30/10
  • 11U for players born 5/1/08 - 4/30/09
  • 12U for players born 5/1/07 - 4/30/08
  • 13U for players born 5/1/06 - 4/30/07
  • 14U for players born 5/1/05 - 4/30/06
  • Gold - Competitive
  • Silver - Competitive Recreational
  • Bronze - Recreational


American League Coordinators

Your Age Group Coordinator is your primary contact for any questions you may have about managing your CBSA team.


David Ziolkowski

Boys 8U Coordinator

Don Rudolph

Boys 9U Coordinator

David Ziolkowski

Boys 10U Coordinator

Tom Shaughnessy

Boys 11U Coordinator

Brian Ziha

Boys 12U Coordinator

Rick Robinson

Boys 13U Coordinator

David Ziolkowski

Boys 14U Coordinator

Brian Eisenloeffel


Baseball Rule Book (3/7/20)

Baseball Rule Grid

Bat Ratio

  • 9U/10U - no drop (Just stamp with 1.15)
  • 11U/12U - -10 (with BPF stamp)
  • 13U - -8 (with BPF stamp)
  • 14U - -5.5 (with BPF stamp)