MLB, MLBPA agree to CBA
Minor League Players to Get Big Salary Bump in Historic CBA
Minor leaguers, MLB reach tentative deal on 1st CBA, sources say - ESPN
Angry players, cranky fans: The life of a minor league umpire
Minor League Baseball Umpire Training Academy - Wikipedia
How is an MLB player's compensation affected when he gets called up from the minors? - Quora
Minor League Umpires To Receive Significant Pay Raise In 2022 — College Baseball, MLB Draft, Prospects - Baseball America
The Complete Prospects Compendium (Part 1), by Tieran Alexander
A History of Strikes and Lockouts