"It is an honor to welcome Dave Winfield to the MLBPA staff," Clark said in a statement. "Dave's passion and dedication to the game and the cause of players is legendary among the brotherhood of players. His prominence and reputation inside and outside the game will serve all players -- past, present and future -- well."
Winfield, who was elected to the Hall of Fame on the first ballot in 2001, was a 12-time All-Star who collected 3,110 hits, 465 home runs and 1,833 RBIs between 1973-95. He played for six teams, spending most of his career with the Yankees and Padres.
"As a former union leader, I'm thrilled to be joining the ranks of the most accomplished and respected sports union in the country to help provide a generational link and historical perspective to today's players," Winfield said in a statement. "I have participated in nearly every aspect of the game, and I look forward to putting that experience to good use in support of Tony Clark and various MLBPA activities and initiatives."
Winfield has kept busy during retirement, serving as a founding member of the advisory board of the MLB Players Trust, a non-profit started by active Major Leaguers in 1996. He also had been an executive vice president and senior advisor for the Padres since 2001.
"We are extremely happy for Dave as he assumes this new role and adds to his illustrious Hall of Fame career that has already spanned parts of five decades as a player and front office executive," Padres president and CEO Mike Dee said. "Dave's experience, perspective and insight will be a tremendous asset to the leadership team at the MLBPA and for all of Major League Baseball.
"We thank Dave for his latest contributions to the Padres over the last 13 years as a member of the front office and wish him, [his wife] Tonya and their family the very best as they begin this new chapter. While we miss him professionally on a weekly basis -- he is, and always will be, a member of our Padres family."
Andrew Simon is a reporter for MLB.com. Follow him on Twitter @HitTheCutoff. This story was not subject to the approval of Major League Baseball or its clubs.