PHOENIX >> The clock is ticking for someone in the Dodgers' starting rotation.Ace Clayton Kershaw will throw approximately 60 pitches in four simulated innings to hitters from Class-A Rancho Cucamonga at Dodger Stadium on Saturday. Left-hander Alex Wood will do the same.Kershaw should be ready to come off the disabled list after passing this final hurdle and could start for the Dodgers as early as Thursday in Washington or Friday in St.