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MSJBO Winter Workouts

Great news! We're offering winter skills workouts to sharpen player's tools ahead of the spring 2024 JBO season. 

Details coming soon!

Spring Baseball Registration Is Now OPEN!


Great news! 2024 JBO Spring registration is now open! Register now through January 31st.

Player evaluation dates for all age and skill levels will be announced soon.

Games schedules should be announce by April 15th.  With regular season league games starting in the last week of April.   

Please note that registration comes with the commitment to be available for some tournaments as decided by the team coach! These are TBD and may vary by level.

JBO Levels
Minors: 3-4th Grade
Juniors: 5-6th Grade
Seniors: 7-8th Grade

Cost: $550

1 game jersey, hat are included in the registration fees.

Registration fees are fully refundable if we are unable to place a player with a team or we are unable to field a particular team due to lower than expected player numbers.

Players may be eligible for financial assistance via THPRD. Simply submit your application!

Band of Baseball Brothers



Learn more about playing a better brand of baseball!

MavUp Development Clinics

Winter Baseball Workouts

Championship Baseball

2021 & 2022 were banner years for Mountainside JBO!

In an unprecedented run for JBO baseball, ALL of our Mountainside JBO teams over the course of these two seasons have won their district divisions, with 6 teams going on to win outright district championships, and with all qualifying for their respective State Championship Tournaments.   

When the dust settled on the 2021 and 2022 seasons, Mountainside JBO  brought home 3 State Championships!

In the annals of JBO history, one of the greatest runs ever for a JBO program!

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

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

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.

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

Mav Up!
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Mountainside JBO