2023 Extra Bases Summer Baseball Camps 


Please visit the tabs above for registration forms and more information.

Below shows spots available as of 6-2-23



Walpole EXTRA BASES CLINIC   as of 6/2/23  

Week 1- June 26-29                  FULL  waiting list only

Week 2- July 3-7 (no July 4)     8 spots remaining

Week 3- July 10-13                   FULL waiting list only

Week 4- July 17-20                  FULL waiting list only

Week 5- July 24-27  Jr Rebs ages 7-8  7 spots remaining

Week 5 July 24-27  3 spots for 9-12 year old players


Time: 9am – 2pm
Monday through Thursday (Friday is the rain make up day)
Ages 8 – 12
West Street Complex (Walpole Little League)         



Braintree EXTRA BASES CLINIC   as of 6/2/23

Week 1- June 26-29   Ages 8-12       FULL Waiting List Only

Week 2 July 10-13      Ages 8-12       16 spots remaining

Week 3 Aug 7-10        Ages 8-12        16 spots remaining

Time: 9am – 2pm
Monday through Thursday (Friday is the rain make up day)
Ages 8 – 12
Hollingsworth Park Complex (Braintree Little League)  

Recreational Camps and Programs Health and Safety Standards for Reopening


Please see the link regarding Meningococcal Disease and Camp Attendees https://www.mass.gov/lists/meningitis-vaccination-requirements

This camp is in compliance with regulations of the Massachusetts Department of Public Health and is licensed by the Walpole Board of Health and Braintree Board of Health


Bill O’Connell Baseball INC.

Extra Bases Baseball Clinic is a youth baseball clinic specifically designed for the development of Braintree and Walpole Little League players between the ages of 8-12.  The Extra Bases Summer Baseball Clinic  prides itself on offering a quality instructional practice.


Bill O’Connell, a Walpole resident, Head Baseball Coach at Braintree High School, and his staff will be conducting their annual (24th year in Walpole and 15th year in Braintree) Little League clinics this coming summer. O’Connell was a 3 sport athlete at Walpole High and then continued his education at the New Hampton School and Springfield College where he was also a 3 sport athlete. He also played for the Chatham A’s in the Cape Cod Baseball League.

Billy O’Connell Head Baseball Coach Braintree High School 2006-Present


2023 Head Coach Team Massachusetts 

2010-2020 Boston Herald Coach of the Decade

2018- Northeast Regional Coach of the Year National Federation High School Sports

2017-18 MIAA Coach of the Year

2016- Boston Globe Coach of the Year

2015- Boston Globe Coach of the Year

2015- ESPN Boston Coach of the Year

2016 Massachusetts Super 8 State Champions

2015 Massachusetts Super 8 State Champions

2014 Massachusetts Super 8 Finalist

Massachusetts Super 8 appearances 2014, 2015, 2016, 2017, 2019

6- Bay State League Championships

NFHS Accredited Interscholastic Coach Level 1

USA Baseball “C” certification

Member of the Massachusetts Coaches Association

Interim Athletic Director Braintree High School


Chris Costello Head Baseball Coach Walpole High School 2016-Present

2023 Pitching Coach Team Massachusetts

Massachusetts Super 8 appearances 2018 and 2019

Bay State League Champions 2017, 2018 and 2019

2003-2015-Head Walpole American Legion Coach

5- State Finals Appearances

6- Zone 6 Championships

237 Career American Legions Wins

1995 Signed with the Boston Red Sox

1991 Drafted by the Los Angeles Dodgers out of Walpole High School

2019 Head Coach of Walpole Little League Williamsport Team- State Champions

New England Gators AAU Coach

Member of the Massachusetts Coaches Association

Clinic Staff

Adult supervision and coaching will be the trademark of this program.  Our coaching staff is selected to ensure the highest quality of instruction.  Our staff is made up of former professional and college baseball players as well has current high school coaches from Braintree and Walpole high school.

Clinic Information

(see daily schedule in tab above)

Daily, individual skills instruction include: throwing and catching, ground ball techniques, batting lectures and drills, pitching, outfield, catching and middle infield stations, rundown execution, proper base running and slide drills.

Each day will provide a lunch break and a special event period competing for daily baseball-related prizes. The snack shack will be open for food purchase during the lunch break.  The last hour of each day will conclude with an organized game.


Junior Weeks 2023

Our junior program is geared toward players ages 7-8.  Players will learn the fundamentals of the game from our experienced staff who combine both instruction and fun to help players understand the game better as well as grow a passion for the game in a “camp” environment.  Monday through Thursday from 9am-11:30am.

Each day players will participate in drills to develop the individual baseball skills as well as play a live coach pitch game.  

Parents are able to request copies of background checks, heath care and discipline policies as well as procedures for filing grievances (section 430. 190 D)

FOLLOW US ON TWITTER: @extrabases12



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