ST. LOUIS, Mo. — Clayton Kershaw dominated for six innings on short rest with the Los Angeles Dodgers scrapping to keep their season alive, but once the seventh inning came, he might have been fatigued just enough to be vulnerable. Slugger Matt Adams stepped forward and took advantage, clobbering a hanging curveball — Kershaw's 102nd pitch — over the fence in right for a go-ahead three-run homer in a 3-2 clinching victory for the St. Louis Cardinals in Game 4 of the National League Division Series. With the Dodgers down 2-1 in the best-of-five series, Kershaw was pitching on three days rest for just the second time in his career. Don Mattingly said the day before that Kershaw would be on something of a pitch count, with 90 being a reasonable expectation, given that he threw 91 pitches against the Braves on short rest in the NLDS a season ago. Mattingly also had little reason to trust his bullpen with a lead, given how it has pitched in the series. Ideally, he wanted to use Kershaw for seven innings and finish with Kenley Jansen. If that was the plan, it was working — except for the Cardinals working counts so that Kershaw racked up pitches. Kershaw allowed...