The late, great Red Barber once said of Marvin Miller, "Marvin Miller, along with Babe Ruth and Jackie Robinson, is one of the two or three most important men in baseball history."

Miller passed away this morning at the ripe old age of 95.  From 1966-1982, Miller served as the head of Major League Baseball's players union.

Before Miller took over, players had little to no rights or leverage when it came to their compensation and pensions.  Miller used his union experience to revolutionize professional sports.

As head of the union, Miller introduced salary arbitration and free agency.  Every player that signs a multi-million dollar, multi-year contract has Marvin Miller to thank.

Miller's tenure in Major League Baseball was not without controversy.  Owners couldn't stand him, and many old line baseball personalities felt he ruined the game.  Others felt he gave players a long overdue 'fair shake.'

Marvin Miller was polarizing.  One thing you can't deny is his impact on Major League Baseball and professional sports.

ESPN.com veteran baseball writer Jerry Crasnick joined the "Sports Spin" to remember the late Marvin Miller.  Crasnick has publicly advocated for him to be enshrined in the baseball hall of fame.