Bills starting running back Fred Jackson will have more tests to determine the severity of a left hand injury that will force the starter to miss at least the remainder of the preseason. Jackson's agent, Jerome Douglas, told The Associated Press by telephone on Saturday that it's too early to determine whether his client will require surgery on what he referred to as "a bone injury." Douglas added that depending on what team doctors inform Jackson, it's likely the player will seek a second medical opinion. "All the diagnostic tests have not been fully performed, but he's going to be out for a little bit," Douglas said, noting that Jackson is scheduled to meet with doctors Saturday. It's unclear which hand Jackson hurt during a 42-17 preseason loss at Washington on Friday night. After the game, Bills coach Chan Gailey didn't divulge the nature of the injury and would only say that Jackson will miss the Bills' final three preseason games. Source: NFL.com