GLENDALE, Ariz. -- Clayton Kershaw is notoriously tough on himself, even in spring training, so take the following self-assessment with a grain of salt.After getting on a dirt mound for the first time since last October -- the high-school field where Kershaw works out in Dallas has an artificial surface -- and throwing his first bullpen session of the spring, Kershaw declared it a disappointment."I feel good, but it was a pretty bad bullpen," Kershaw said.