GLENDALE, Ariz. -- Clayton Kershaw isn't really an ease-into-things kind of pitcher. He is the kind of guy who relentlessly attacks the strike zone until either the game ends or Don Mattingly visits him and insists on having the ball.So, Kershaw wasn't surprised to hear he had touched 94 mph in his first inning of spring training. He was clocked by scouts behind home plate. For him the spring isn't so much about building arm strength so he can throw harder, it's about building endurance so he can maintain it.