Detroit Lions 11/16/2007 8:12 AMThe Detroit Free Press reports Lions WR Calvin Johnson keeps aggravating his back injury. On the Lions' first offensive play Sunday at Arizona, Johnson fell awkwardly in the end zone trying to make a catch. "I told him yesterday, 'You know how to fix that, Calvin?' " offensive coordinator Mike Martz said Thursday. "He said, 'How?' I said, 'Don't fall on your back.' He didn't think it was funny." Johnson is expected to play Sunday against the Giants. He has missed one game since first injuring his back Sept. 23 at Philadelphia. But he has been limited in practices and games. He has 21 catches for 357 yards and two touchdowns, disappointing numbers for the second overall pick in the draft.Read more