CHICAGO >> The Dodgers' secret weapon lately isn't a bubble machine, or a 28-year-old somewhat eccentric mystic named Sidd Finch. The secret isn't even very well-kept.The more lopsided blowouts they find themselves in -- the more lopsided, the better -- the more manager Don Mattingly is able to empty his bench and rest his starters, a rare luxury for a team that hasn't led its division by more than four games all month.