Lou Piniella has decided to retire as manager after finishing the season with the Cubs. Piniella, who turns 67 on Aug. 28, issued a statement on Tuesday, saying he wanted to enter a new phase in his life. "I couldn't be more appreciative of the Cubs organization for providing me the opportunity to manage this ballclub," Piniella said in his statement. "I've had four wonderful years here that I wouldn't trade for anything in the world. "I've grown to love the city and the fans, but at my age, it will be time to enter a new phase in my life," he said. "It will enable me to spend more valuable time with my family -- my wife, my kids and my grandchildren. God has blessed me to have been able to work this many years in the game that I love."