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The American Association of Professional Baseball is a professional baseball Partner League of MLB, founded in 2005. As a Partner League, the American Association collaborates with MLB on initiatives to provide organized baseball to communities throughout the United States and Canada.

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The Frontier League is an MLB Partner League with 16 member clubs in the Northeastern and Midwestern United States, and Eastern Canada. Formed in 1993, it is the oldest currently operating professional independent baseball league in the United States. As a Partner League, the Frontier League collaborates with MLB on initiatives to provide organized baseball to communities throughout the United States and Canada while working to expand the geographic reach of the game.


atlantic league

The Atlantic League of Professional Baseball (ALPB) is a professional independent baseball league based in the United States. It is an official MLB Partner League, based in the Mid-Atlantic and Southeastern United States. The Atlantic League's corporate headquarters is in Lancaster, PA.



The Northwoods League is the proven leader in the development of elite college baseball players. The 2024 season will mark the 31st season of the Northwoods League. It is the largest organized baseball league in the world with 23 teams, drawing significantly more fans, in a friendly ballpark experience, than any league of its kind. A valuable training ground for coaches, umpires and front office staff, over 310 Northwoods League players have advanced to Major League Baseball.


WESt coast league

The West Coast League (WCL) is the premier summer collegiate baseball league west of the Mississippi. Situated in the beautiful Pacific Northwest, the seventeen-year-old, fifteen-team, professionally operated wood-bat league showcases pro prospects from major conferences around the nation. Every summer, the league features unparalleled fan and player experiences, with the best summer weather in North America. 

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mid-america league

The Mid-America League is a new premium baseball development league in the geographic area of Oklahoma, Arkansas, Texas, and Louisiana, and will begin play in 2024. The League will play a 68-game schedule to start in late May and run through early August, concluding with playoffs to determine the League champion.

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California winter league

The California Winter League is an instructional showcase league for free agent baseball players who are looking to earn a professional contract before spring training begins. The league was created by Andrew Starke in 2010, and takes place in Palm Springs, California, at the Palm Springs Stadium complex which is a former spring training facility of the Los Angeles Angels. Every year, roughly 40% of CWL players receive a professional contract offer. The league has a partnership agreement with the Frontier League for scouting and player development.



Wendelstedt Umpire School

The Wendelstedt Umpire School is an umpire training school located in Ormond Beach, Florida. It runs for five weeks each year from early January through early February. The school was previously known as the Bill McGowan School for Umpires and the Al Somers Umpire School. The Wendelstedt Umpire School has produced more MLB umpires than all other schools in history combined. It has fourteen full-time MLB umpires and a number of minor league umpires on its staff. 


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PLAY treasure coast sports commission

Play Treasure Coast Sports Tourism, formerly known as the Treasure Coast Sports Commission, offers event owners and managers access to world class sport facilities, special pricing on hotels from our partners and grants to help fund your event. Located on the East Central Coast of Florida, comprising of Indian River, St. Lucie and Martin Counties,



The nation's leading supplier of officiating gear. Get all of your officiating gear in one place for low prices! Purchase Officials is dedicated to bringing customers the highest quality gear, apparel, and customer service. On-field supplier of apparel for the Umpire Placement Course, and official on-field supplier of uniforms for the Frontier League, Northwoods League, West Coast League, and Mid-America League.

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