The Great Lakes Summer Collegiate League (GLSCL) is an collegiate summer baseball league in the Great Lakes region of the United States that is affiliated with the Alliance of Summer College Baseball and comprises teams with collegiate baseball players from around North America. Players are not paid so as to maintain their NCAA eligibility, and the league follows NCAA rules. Many of the teams play in baseball stadiums that are normally occupied by college teams.
The Great Lakes Summer Collegiate League uses wooden bats to ease the transition to professional baseball for collegiate players.