Collegiate Summer Baseball Leagues (CSBL) are amateur baseball leagues in the United States featuring players who have attended at least one year of college and have at least one year of athletic eligibility remaining. Generally, they operate from early June to early August. Players use wooden baseball bats, hence the common nickname of these leagues as "wood bat leagues".

Finding a collegiate summer team, players will work with their college coaches and the CSBL teams General Managers. They report to summer leagues after completing their spring collegiate season with their college teams. Some players arrive late due to their college team's postseason play, which sometimes runs into early June. In some cases, players are drafted during the collegiate summer season. These draftees can remain with their collegiate summer team until they sign a professional contract. During the season, players are housed by volunteer host families and bussed to and from road games.

The leagues vary greatly in their attendances, quality of play and ability to attract scouts. Most teams are usually filled before thinking about playing summer ball and is very competitive to get a position on a team. Many CSBL teams occupy cities and ballparks where a minor league team has left a city and run as a non-profit organization.

Our database has each CSBL and team information to assist in finding any openings and the CSBL General Managers can search for collegiate summer players.