One of the feel-good stories of training camp had been that rookie MLB Casey Matthews had understood and was making all of the calls as the starter from the first day after football commenced. He showed little in the preseason opener, but it was in a brief appearance, so few alarm bells went off. But during a poor showing in the preseason loss to the Steelers on Thursday, some weaknesses came to light. Matthews struggled badly to get off blocks, even though he moved very well and clearly is athletic enough for the position. He also struggled in zone coverage to stay with WR Jerricho Cotchery long enough before the safeties could pick him up and didn't flow laterally as well as his athleticism should allow him to. The book is not closed on Matthews starting, and he might be only a 30- to 35-play player in that role, anyway. But more games like the Steelers loss, and the Eagles might have to switch gears.