Vikings coach Brad Childress has defended the work ethic of quarterback Tarvaris Jackson. Childress said that he wanted to "set the record straight" about Jackson's work ethic on Friday. "Tarvaris Jackson is one of the hardest-working guys you're going to find on this 85-man roster right now," Childress said. "Just in terms of the time he spends here, the time he spends in the books, with the wide receivers, in the weight room, strength and conditioning ... there are very few people who work as hard as he does in the offseason."