Adult Sports Information
Rules & Forms
Equipment Information
Want to know if your bat is legal?
Click below for all current USA equipment information.
Unless specified in the City Rules above please refer to the USA Adult Slow-pitch Rulebook
Please Read
Teams need the City of San Mateo's approval to Add/Drop any players after 3rd game!!!
Field Condition Hotline
650.522.7439
Twitter Account
Follow @smfieldupdates
Interested In Our Leagues?
For more information about the Regional Softball League please email Deputy Commissioner,
Free Agent Information
If you are a "Free Agent" and are looking for a team to join please email Deputy Commissioner Mary Villarin @ mvillarin@cityofsanmateo.org In your email please include: Information you are comfortable sharing about yourself (experience playing softball/baseball, positions played, nights available, etc.) Your preferred contact information (cell phone, email, etc.) Please put FREE AGENT in the subject line & be aware that your email will be copied and pasted to over 1200 managers.
Don't Be...
"That Guy/Girl"
The San Mateo & Belmont Regional Adult Softball League is a Recreational League. Recreational Leagues are meant to be "Recreational."
rec·re·a·tion·al
relating to or denoting activity done for enjoyment when one is not working.
Healthy competition is great but don't be the person that gets tossed from an adult slow pitch softball game.
The pitches slowly come in underhand on an arc
The umpires are human
There are no scouts in the stands
The t-shirts given to the league champs are $8
We all have lives off the field
Play hard, have fun, and be a good sport!!!
2021 Rule of Emphasis
Under NO Circumstances may a player from another team fill in on a different team in the same league. There are no exceptions to this rule. Any team caught utilizing a player on another team's roster within the same league will automatically be given a forfeit. Any player caught playing for 2 different teams may also be subject to disciplinary action.
Registration starts Monday, January 24th at 9am
The Registration Deadline is Friday, February 25th at 5pm
