Rocky Mountain Baseball League

Overview

Founded in 1999 as the Colorado Semi-Pro Baseball League (rebranded to Rocky Mountain Baseball League), the RMBL is a collegiate summer wood-bat league with 9 teams across Colorado, Kansas, and Nebraska. It focuses on player development for NCAA-eligible athletes, with a season from early June to late July (including games in July 2025 per schedules). The league is affiliated with the National Baseball Congress and provides a path to the NBC World Series. It operates as a non-profit, emphasizing competitive play and community involvement, with teams like the St. Joseph Mustangs from related leagues sharing affiliations.