Mountainside JBO

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Mountainside JBO Mountainside JBO is an Oregon non-profit youth baseball league that plays in the Junior Baseball Org Why JBO? What's the difference?

Teams:
*There are 3 primary age Divisions in JBO- Seniors (7th/8th), Juniors (5th/6th) and Minors (3rd/4th).
*Players are placed onto teams based on three skill levels per Division- Federal (highest level), American (Mid) and National. This provides an appropriate level of competition and allows kids to thrive in a level against like talent and development.
*Teams stay together as a team unit for the entire season, all the way through the postseason. There are no "all-star" teams per se- the team is the all-star team, affording everyone the opportunity to experience postseason play.
*JBO uses high school baseball rules. This allows youth to develops a complete understanding of the more advanced game of baseball and better prepares a kid to excel at the high school level.
*Players learn advanced situational baseball skills, including base stealing and smart base running, leading off, etc. Pitchers and position players learn how to properly defend aggressive base running at an early level, so it is fluent by high school.
*JBO leagues are direct feeder programs to the local high school teams. Where possible, we work with the Mountainside High baseball coaches on clinics, tournaments, and evaluations. Fields:
*Fields grow as the players grow, allowing an easier transition and optimal development.
*Players have a smooth transition to high school full-size baseball diamond. Minors (3rd-4th): 45' pitching/ 60' base paths

Juniors (5th-6th): 50' pitching/ 70' base paths

Seniors (7th-8th): 60.6' pitching/ 90' base paths

Register here: 👉🏼 https://mountainsidejbo.sportngin.com/register/form/644360672* Winter Workouts: December 1 through Jan...
10/05/2026

Register here: 👉🏼 https://mountainsidejbo.sportngin.com/register/form/644360672

* Winter Workouts: December 1 through January 31
* Register for Winter Workouts only, Spring Baseball only, or both (Save $100 when registering for Winter Workouts & Spring Baseball together)
* Volunteer coaches are needed

UPDATE: Registration will remain open until August 9th for 2026 Fall Ball! ⚾️ Spots available are: Minors 3rd & 4th grad...
08/03/2026

UPDATE: Registration will remain open until August 9th for 2026 Fall Ball! ⚾️

Spots available are:
Minors 3rd & 4th grade
Juniors 5th & 6th grade

If your kids enjoy being on the field, grab their spot TODAY!

Click here 👉🏼 https://mountainsidejbo.sportngin.com/register/form/253753002 to signup!

Season dates/info: 
* September 13th– October 18th (No games over Labor Day Weekend) 
* 6-game schedule- Guaranteed 

Go Mavs! 🩵🤍🖤

⚾ One Last Game. One Special Season. 💙🖤To wrap up an unforgettable season, our MSJBO Senior National players took the fi...
07/17/2026

⚾ One Last Game. One Special Season. 💙🖤

To wrap up an unforgettable season, our MSJBO Senior National players took the field one last time… against the people who’ve been cheering them on every step of the way—the parents.

There were plenty of laughs, many competitive moments, lots of food, and memories that will last forever.

This team has grown so much over the past several months, and that doesn’t happen without an incredible village. Thanks so much to our coaches for investing your time, patience, and leadership. Thank you to our parents for every ride, every meal, every cheer from the stands, every load of laundry, and every sacrifice made behind the scenes.

Lastly, thank you to these boys for representing Mountainside with heart, resilience, and sportsmanship all season long. We couldn’t be more proud of you guys!

Here’s to a season we’ll never forget!

💙🖤 🩵 Go Mavs! ⚾

07/12/2026

Time to give a shoutout to our Mountainside JBO Minor American team for their great season. They tied for 2nd in season and went 2-2 in districts. Way to go!

07/11/2026

Let’s go!!!! seniornats

Fourth at state as it stands, and we’re playing at 4:30 for even better. What an experience this has been! This is fun, ...
07/11/2026

Fourth at state as it stands, and we’re playing at 4:30 for even better. What an experience this has been! This is fun, y’all! Go MAVS! So proud of this team! Thanks to all the coaches, parents, families, and friends for the support. Let’s go!!!

Winners’ bracket. MSJBO Nats at State Tourney—all smiles. 🩵⚾️ 💙
07/11/2026

Winners’ bracket. MSJBO Nats at State Tourney—all smiles. 🩵⚾️ 💙

07/10/2026

Mountainside JBO Senior American took the win against Spartans 12-10! 🙌🏻

Next up:

Mountainside vs Tillamook @ 3p TOMORROW! LET’S GOOOO!!! 🩵🖤🤍

Shoutout to our Senior American crew! 🙌🏻 They have battled all season and now they head into their district tournament. ...
07/08/2026

Shoutout to our Senior American crew! 🙌🏻 They have battled all season and now they head into their district tournament.

📍Hare Field
🗓️ July 9th
⏰ 6pm

Let’s fill the stands and get loud! 🩵🖤🤍 Go MAVS!

Address

12500 SW 175th Avenue
Beaverton, OR
97007

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