[img]http://d.yimg.com/a/p/ap/20100720/capt.f68d45637f6a415aad019c1b01645a3d-f68d45637f6a415aad019c1b01645a3d-0.jpg?x=130&y=92&q=85&sig=rEy.4bPGfeOtP34sFeWFeA--[/img]AP - Chicago Cubs manager Lou Piniella announced Tuesday that he will retire at the end of the season, ending a storied and often colorful career that included 18 years in the majors as a player and another 22 as a manager.