5. The secondary always seems to have injury concerns. It starts with safety Bob Sanders. When he's on the field, he's as good as any safety in the game. The problem is he's missed 35 games in his five years. He missed 10 games with a knee injury last season after being the NFL Defensive Player of the Year in 2007. He has to be on the field for the Colts to have a chance to be a top-tier defense. Word is he's tired of talking about his injuries so he's limiting his time with the media. He's one of the good guys, which makes that sad to see. Corner Marlin Jackson is coming off a torn ACL suffered in late October last season. He's expected to take part in practice next week. The Colts need both of those players on the field.