ESPN

Welcome to The Show! On Friday, the historic sports labor negotiator Marvin Miller will log on at 2:15 ET for a special appearance in chat.

From 1966-1981, Marvin Miller served as the first executive director of MLB's Players Association (MLBPA). Miller presided over the suspension of baseball's ''reserve clause'' that bound players to the team that held their contract, the introduction of ''salary arbitration'' in player-management disputes and the birth of ''free agency'' that allowed a player movement to seek the best offer for his services.

Miller negotiated the MLBPA's first five labor contracts and successfully led players in the strikes of 1972 and 1981. The Sporting News ranked Miller fifth on its list of the "100 Most Powerful People in Sports for the 20th Century."

Send in your questions to Miller now, then join him right here for the answers on Friday.