M.L.B. Players Association Working to Unionize Minor Leaguers - The New York Times

Majority of minor league baseball players turn in union authorization cards, paving way for MLBPA membership - ESPN

MLB lockout: Players finally asking for the right things - Athletics Nation

MLB is ready to recognize a minor league union : NPR

MLB players' association trying to unionize minor leaguers

MiLB unionization, new CBA could happen as soon as 2023 season - Ballpark Digest

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

Hit the go button': The six years that made baseball's minor league union - The Athletic

Service time manipulation: Why MLB teams wait to call up prospects

Astros' longtime Tri-City affiliate not part of new minor league structure

Minor League Baseball players set to unionize with the MLB Players Association

Where Are They Now? Independent Baseball's Role In The Road To The MLB Stage - USPBL