Minor League Baseball players haven't unionized, and here's why

MLBPA Starts Campaign to Unionize Minor League Baseball Players - Bloomberg

MLB is ready to recognize a minor league union : NPR

Verlander going back to Houston highlights flurry of MLB trades ahead of Tuesday's deadline - The San Diego Union-Tribune

Players Realize Now: They're Workers”: Why Baseball Minor Leaguers Voted to Unionize - In These Times

A Primer on Minor League Free Agency - Viva El Birdos

MLB and union on different pages regarding longer playoff pitch clock

MLB pitchers lost in translation no more - The San Diego Union-Tribune

Minor-league baseball players unionize: Minor leaguers officially join MLBPA after authorization

MLBPA] The Major League Baseball Players Association has launched a campaign to unionize Minor League Players across the country (Full statement in the link) : r/baseball