Softball League: Register Now!

2023 Summer Softball League on Mercer Island

Since 1981, the J’s co-rec softball league has been a mainstay of Mercer Island summers. Whether you’re a competitive veteran after the title or a rookie just looking to relax and have some fun in the sun, we’ve got a place for you.

Softball returns this summer with Sunday games on the newly renovated South Mercer Playfields. Plus: umpires are back this year. Join us this summer on the diamond!

Summer 2023

Schedule: June 25-August 6, 2023
Games: Sundays between 11 am and 2 pm
Location: South Mercer Playfields, 8220 SE 78th St, Mercer Island

The SJCC is excited to launch our new online membership and registration system. For assistance on registering, please click here >>.


  • $95 members
  • $120 guests
  • $1,700 team (12-30 players)

Become a Team Captain!
We’re looking for team captains for the 2023 softball season! Interested? Contact Austin Williams at

Team Requirements

  • Minimum of 12 players; maximum of 30
  • Ages 15+
  • As a co-recreational league, the expectation is a least 4 women on the field and in the lineup
  • Your team can have 3 women on the field, but then only 9 players on the field, rather than 10 and every fourth women batter is an out
  • Rules will be given out at the beginning of the season
  • For other questions email us