From SABR member Graham Womack at Baseball Past and Present on April 27, 2015:
Marvin Miller became executive director of the Major League Baseball Players Association in 1966 because for 20 years prior, things got progressively worse for players.
Consider that in 1967, the minimum salary in the majors was $6,000. The first minimum salary in 1946 was $5,000, and, accounting for inflation, minimum-salaried MLB players got 29.8% less in 1967 than they did in 1946.
I think baseball began to change economically when television dollars first entered the game in the 1940s and that initially, team management kept a large share of the new revenue for itself.
Read the full article here: http://baseballpastandpresent.com/2015/04/27/mlb-salaries-stayed-longer-people/
Originally published: April 27, 2015. Last Updated: April 27, 2015.