CHICAGO (AP) - Jon Lester recovered from a rut of bad starts, pitching six shutout innings to help the Chicago Cubs rout the Seattle Mariners 12-1 on Friday for their third straight victory.Jason Heyward and David Ross homered and the NL Central leaders improved to 10-5 since a 1-9 slump.Seattle lost in its first trip to Wrigley Field since 2007.