Fundraising event to support rare disease research for the PSMC5 foundation. The PSMC5 foundation was created to advance research and treatment options for Ollie Myers and Yoni Silverman who share a rare disease impacting their proteasome, a critical cellular component. All funds raised will be donated to research underway at Harvard Medical School, Goldberg Labatory and at Cambridge Univerity, Institute of Medical Research. To learn more please visit

Please join our fall PSMC5 Fundraiser for a fun day of wiffle ball and music, all for a great cause.  With separate age groups for kids and adults, and other activities like dunk tanks and home run derby, we hope to have a great day for all ages at beautiful Nutile Field in Winchester, Massachusetts.   

All registered teams will play at least two games, and the winning teams will get their names etched in the Winchester Wiffle Trophy.  Sign up today and be part of the fun! 





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Robert J. Nutile Field, Winchester, MA 01890


October 8, 2022 (Rain Date: October 9) from 9am - 9pm


Create or Join a team to participate. Teams can register together or if you would like to participate but do not have a team, please register as an individual and we will create a team for you to join.

There will also be music, food and fun games for the whole family!


Have some fun and raise a few bucks for a good cause

Categories of Participation

Major League – Any ages.  More serious, fast pitching is allowed.  $100 per player, $500 per team

Minor League – Any ages.  Less serious, "pitch to contact".  $100 per player, $500 per team

Kids – 12 and under.  $50 per player, $300 per team

Volunteer.  Care to volunteer at the event? 


Rules of Play

Tournament Structure

The tournament will follow a double-elimination structure.  All teams will play at least two games.


Consist of between 4 and 8 players.  A maximum of six can play in the field at any time. 

Playing Field

Bases 40’ apart.  Pitchers rubber 30’ from home plate.  Outfield fence is 100’

There will be an object strike zone placed behind home plate to represent a strike zone


Will use official wiffle ball and bats, and the tournament will provide them.  No gloves allowed


Tournament will provide volunteer umpires


Games are 4 innings, and no inning will start after 45 minutes has passed

3 balls are a walk, and 2 strikes are a strikeout (can’t strike out on a foul)


In the Youth and Minors division, it is “pitch to hit” and the batter can ask pitchers to slow it down.  In the Majors division, there is no restriction.


Runners can leave the base once the ball is hit. No ghost runners. No leading or stealing


Fielders can throw the ball at a runner to record an out.  If the runner is hit above the neck, the runner is safe.


Team should announce the score at the end of each half inning

Score sheets will be provided to each team