Most improved player in Raiders camp: Darrius Heyward-Bey DHB — who had just nine catches as a rookie last season — has noticeably improved his pass-catching skills. Instead of letting the ball come to him, Heyward-Bey is attacking the ball and snatching it with his hands. Part of the success can be attributed to Jackson’s schemes. The offensive coordinator has designed quick routes in which DHB can run to a spot and make a quick turn. He’s also catching quicker, shorter passes that emphasize his running ability. But unlike last season, Heyward-Bey is playing with confidence. Let’s face it, the Raiders’ receiving corps is untapped because former starting quarterback JaMarcus Russell couldn’t get the ball to wide receivers. No receiver on the roster has better than a 34-catch season. DHB, Chaz Schilens, Louis Murphy and Todd Watkins have only 95 catches combined during their NFL careers.