By Walt Hickey MLB Major League Baseball and the Players Association have gone to the mattresses, as the two sides have failed to come to a labor agreement and the league locked the players out. At issue is a key split in the revenues that go to the owners and the salaries that go to the players. The average MLB salary is up just 21 percent from a decade ago, and has been flat since 2015. At the same time, the average MLB team’s value has popped to $2.2 billion, and the league added $1 billion in total annual revenue from 2015 to 2019. And while players in the NFL and NBA have reaped some of their league’s gains through guaranteed percentages of revenue, ball players have not. The