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10U Black tie 25th out of 45 teams at Western Nationals Moorpark, CA

10U Black at Western Nationals in Moorpark, CA July 22-28, 2019

10U Gold takes 1st Place Field of Dreams Pleasant Hill July 14, 2019


Rebecca Fong - University of Hawaii
Kassidy Stetler - California State University Monterey Bay
Elodie Townsend - Smith College
Kim Scarsella - Cornell University
Aria Pogni - Loyola Marymount University
Anne-Marie Iker - Amherst College
Shawn McCullough - Feather River College
Sami Mericle – Oberlin College

Know others?  Please email


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2021 MGS Tremors Fall Ball Tryout Registration is Now OPEN!


Registration for tryouts closes August 26th.

Fall Ball is considered the more relaxed of the competitive seasons. Mainly because there are no championships to speak of. It’s more about developing new skills or playing up to a new age group. It doesn’t mean that it’s any less competitive at tournaments, or that you’ll be working out any less rigorously. 

MGS Tremors is holding tryouts for the following age groups by birth year:

8U (2013 and athletic 2014s),

10U (2011s and 2012s),

12U (2009s and 2010s), and

14U (2007s and 2008s). 

The tryouts will include a specific pitcher and catchers tryout on Saturday, August 28th, and an all-player tryout on Sunday, August 29th.  Pitchers and catchers will be required to attend both unless otherwise advised.

The times for the tryouts are as follows:

Pitchers and Catchers Only

Saturday, August 28th
Bernard Hoffman Field, San Rafael

8U and 10U:   9:30am - 11:00am
12U and 14U:  11:00am - 12:30pm

All Players (Inc. Pitchers and Catchers unless otherwise advised)

Sunday, August 29th
Bernard Hoffman Field, San Rafael

8U:  9:00am - 10:30am
10U:  10:15am - 11:45am
12U: 11:30am - 1:00pm
14U: 12:40pm - 2:15pm

Players will be released from tryouts as coaches complete their assessments.

MGS Tremors will compete in three tournaments during the Fall Ball season. The season will run from early September through to the last weekend of October. These Fall Ball tournaments are fun, themed events, including “Play for the Cure” and “Spooky Halloween”.   A family break is scheduled for Labor Day Weekend so feel free to plan a family weekend. 

Teams will practice three times a week (including weekends) during non-tournament weeks, and twice a week during tournament weeks. (Except forementioned Labor Day). Practice times and locations will not be determined until after tryouts, so if you’re not willing to travel up or down Marin for practices, it might be a sign it’s time to take a break.

It is okay to play other sports during the Fall Ball season, however, players should be able to make at least one practice (if your other sport conflicts, not because you’re tired), and the three tournaments. If the thought of three practices is exhausting, that's a good sign your player needs a break over the fall. You must let us know during registration for the tryouts if you will be playing other sports, or plan to be unavailable during this time. It does not mean you’re out, it just helps us plan numbers.

The first tournament will be the CSA September Shoot Out - September 18/19 in Vacaville. The other tournaments will be scheduled as they are opened.  Tournaments will be as far north as Sacramento, and as far south as Santa Clara.

To signup for the MGS Tremors Fall Ball tryouts, please click here:



This Fall Ball season, our head coaches for each team will be the primary selector, assisted by other MGS Tremor's coaches.  We will only be fielding teams (and holding tryouts) for those that have coaching staff identified.  We still have a number of head and assistant coaching positions available.  If you are interested in coaching (in head or asst capacity) please complete the application form here.



In addition to the coaching positions and team volunteer positions, MGS Tremors needs more volunteers to help run the program.  We have positions available for the following roles:

-Website and social media

-Equipment manager



-Clinic coordinator

-Tryouts Coordinator

These are not team-specific positions.  These are positions for the entire program.  If you are looking for a great way to give back to the community, and are interested in being part of a team making a huge difference for our players, please apply for the volunteer positions here:


Need Tremors Swag? Visit the store!

Tremors gear is available at our new online squad locker store.   Enter the code TREMORS15AS to get a 15% discount on all purchases.   To visit the store, please click here.

Need something urgently?   Visit T&B Sports on the corner of 4th and D Streets in San Rafael.  They have a range of gear they can rapidly add a Tremors logo.


MGS Tremors Black is the most competitive team program for MGS Tremors.  Teams compete in Open, A and B tournaments around the Bay Area and state.   Tryouts for the MGS Tremors Black teams were held December, 2020, with practices starting in January.

To learn more about our Tremors Black program, click here.

To compare all of our programs, click here.


MGS Tremors Gold

MGS Tremors Gold is our Summer Travel Ball program.  Kicking off right after the completion on the MGS recreation season, the MGS Tremors Gold program is the core of MGS Tremors.  

To learn more about our  Tremors Gold program, click here.

To compare all of our programs, click here.

MGS Tremors Club

MGS Tremors Club program is for players who are developing their game, or are not quite ready for the commitment of Travel Ball.  Our Club program is one of the most popular programs we conduct each year. 

To learn more about the Marin Tremors program, click here.

To compare all of our programs, click here.

8U at State Championships Opening Ceremonies San Diego July 12, 2019

Who is MGS Tremors?

MGS Tremors is the competitive travel ball and summer club program for Marin Girls Softball.  Marin Tremors is open to all registered Marin Girls Softball players and field teams from 8U to 14U. 

MGS Tremors hosts teams with players that range from the elite, to the developing player.   We are incredibly proud of this focus, ensuring that every player that wants to continue developing their competitive softball, has the opportunity to do so.

Our programs start in January (Tremors Black), May (Tremors Gold and Club), and September (Tremors Fall Ball). 

Click here to visit our About Us page.


16U Black takes 1st Place NorCal All-Star Tournament July 18, 2021

Tremors 14U Black Watsonville Gold Bracket Champions July 25, 2021

14U Black 1st Place Gold Bracket Champions Watsonville July 25, 2021

Tremors 12U Black play under lights, finishing 3rd in the Double Double AST Tournament on April 6/7

8U takes 1st Place Petaluma Father's Day June 16, 2019

12U Black won Silver 1st Place CSA Incline Village, NV July 11, 2021

10U Gold takes Silver 2nd Place CSA Napa/Vacaville June 9, 2019

12U '05 Team wins 2018 Rohnert Park Rebel Classic July 22, 2018!

12U '06 Team takes Silver 2nd Place in Napa June 10, 2018

12U Black takes 2nd Place Wine Country Classic Windsor June 9, 2019

10U B Team takes 2nd Place Windsor July 1 2018

16U Black took Silver 2nd Place San Ramon June 27, 2021

8U Team wins 1st Place Wine Country Classic Windsor June 9, 2019

12U Gold takes Silver 2nd Place CSA Napa/Vacaville June 9, 2019

10U C Team takes 2nd Place San Jose July 8 2018

12U Gold takes Silver 1st Place San Jose Bagby Classic June 16, 2019

12U Gold takes Silver 1st Place San Jose Bagby Classic June 16, 2019

14U Black takes 1st Place Benecia Firecracker Invitational July 7, 2019

10U Gold takes Silver 2nd Rohnert Park Rebel Classic July 18, 2021

10U Black takes 2nd Place CSA Incline Village, NV June 16, 2019

10U Black takes 2nd Place Wine Country Classic Windsor June 9, 2019

Fall 10U take Napa tournament Sept 16 2018

10U Team takes Silver 1st Place in Napa Sept 16, 2018

8U Team takes 2nd Place Windsor July 1 2018

10U Black takes Gold 2nd Place AST Queen of the Hill Martinez April 14, 2019