Clayton Kershaw is on schedule to make his Spring Training debut on March 9, despite suffering from mild back tightness this week. The injury pushed back his first bullpen session to at least Friday, said manager Don Mattingly. "It's just precautionary. We're not taking a chance," Mattingly said. "He's on schedule for his first start. The bullpen [session] is Friday, at least it's scheduled for Friday. He's able to do everything. He wanted to do the first bullpen [session Wednesday], but we're not letting him, just because he didn't want to miss the first day of school."