Last Tuesday, during the Dodgers’ final preseason exhibition game against the Angels at Dodger Stadium , manager Dave Roberts got up from his perch at the top step of the dugout and went to find Roki Sasaki. To most outside observers, Sasaki had just suffered a five-alarm, red-flag, siren-sounding sort of spring training . His ERA was 15.58. He’d walked 15 batters in just 8 ⅔ innings. The night before, he’d reached a new low in issuing six walks and hitting two batters during a final spring