More than anything else, money changed professional sports during the 1970s. In football and baseball, moneymaking television contracts led to changes in the rules and a lengthening of the season. Playoffs in both sports extended the seasons and brought huge revenues. Players wanted a share of the increased revenues, and players unions organized to demand higher pay and more freedom to move from team to team. In baseball, a policy called "free agency" moved players around and helped a number of players reach salaries at or near $1 million a year.
Professional baseball was dominated by the Cincinnati.....