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Band of Baseball Brothers


Coming Soon


Learn more about playing a better brand of baseball!

MavUp Development Clinics

Winter Training & Clinics Starting Now

Championship Baseball

2021 was a banner year for Mountainside JBO!

In an unprecedented year for youth baseball, ALL of our Mountainside JBO teams won their district divisions, with several going on to win outright district championships, and with all qualifying for their State Tournaments.   

When the dust settled on the 2021 season, two of our teams brought home State Championships, two others finished in 3rd place in the State playoffs, and all represented at the State level.   In the annals of JBO history, one of the greatest seasons ever!

Such great showing is a testament to the quality of the players and coaches that are part of Mountainside JBO!  

Come be part of our Championship program, while playing a high quality brand of baseball-- with your classmates and friends.

Breaking News- Important Updates


  • We are working to get REGISTRATION open the week of January 10th.
  • Evaluations will be the first and/or second week of February.  Exact date, time(s) and locations revealed soon.

About Mountainside JBO

Mountainside Junior Baseball Organization (JBO) is a 501(c)(3) non-profit organization that was established in 2017 to compete as an affiliate in Oregon's Westside JBO district, while offering a youth baseball playing alternative in the Mountainside High School district.

The Mountainside JBO program is directly aligned with Mountainside High School and works closely with Ryan Fobert, the Mountainside High School Head Varsity baseball coach, and his coaching staff.   This strategic alignment aims in helping to provide the area's youth with the development, skills and competition needed to not only flourish as youth players, but also provide a segue to high school baseball.  

The goal of Mountainside JBO is to build a league of players who reside in the Mountainside High School boundaries and allow them to compete against other players of equal age and skill, while ultimately achieving their full baseball potential. And because of its connection to the the high school program, Mountainside JBO is in a unique position to prepare your child to play High School Baseball at Mountainside.

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Mav Swag


Click the "Mav Swag" link directly above to be directed to our our online store, where you can see all our Mountainside JBO swag. Show off your Mav Pride today!

The Stampede- Your Mavs in Action

Mountainside JBO is a proud member of the Westside JBO District

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Mountainside JBO