Who was the labor organization leader who helped bring about free agency for athletes, changing baseball's economic and power structures?

• A. Pete Rose
• B. Tammy Thompson
• C. Marvin Miller
• D. Olympia (1936)

Answer: (C)

The key idea here is labor leadership that transformed how players are compensated and governed in baseball. Before free agency, players were tightly bound by the reserve clause, which kept salaries low and limited their ability to switch teams. The modern shift came from the efforts of the MLB Players Association under its leader, Marvin Miller. As executive director, Miller fought to empower players, culminating in the breakthrough that led to free agency after the landmark arbitration decisions in the 1970s. This change allowed players to sign with other teams once they reached certain service thresholds, creating real market competition for talent and shifting economic and power dynamics away from teams toward the players. Pete Rose is a famed player, not a labor leader; the others listed aren’t known for steering this pivotal labor change.