DALLAS (Reuters) - Baseball Hall of Famer Nolan Ryan will oversee all aspects of the Texas Rangers after adding the business side to his baseball responsibilities in an ownership shake-up announced by the club on Friday.

Ryan consolidated control of the American League champions with managing partner and CEO Chuck Greenberg stepping aside and selling his interest in the Rangers after putting together the ownership group that bought the team last August.

The move came just three weeks away from Opening Day for the Rangers, who reached the World Series last season for the first time in 50 years as a franchise.

Greenberg's abrupt departure suggested there was conflict within the ownership group about the way the club had been operating, and the sides had been in mediation the past week, Major League Baseball website mlb.com reported.

"I have great respect for the Texas Rangers franchise and am enormously proud of all we have accomplished together since August," Greenberg said in a statement released by the team.

"Unfortunately, Nolan Ryan, the co-chairmen and I have somewhat different styles. While I am disappointed we did not work through our differences, I remain wholeheartedly committed to doing what's right for the franchise."

Ryan thanked Greenberg for his contributions to the team and expressed optimism going forward.

"I am excited about the future of the Texas Rangers in so many ways," Ryan said in a statement.

"Our front office is comprised of talented and passionate people who come to work every day with the goal of making us the best organization in Major League Baseball, on and off the field."

Greenberg's group, including Ryan, Dallas businessman Ray Davis and Fort Worth oilman Bob Simpson, won control of the Rangers by being the highest bidder in an auction conducted in United States Bankruptcy Court with a bid of $590 million.

(Writing by Larry Fine in New York, Editing by Frank Pingue)