Indianapolis Colts star pass-rusher Robert Mathis will miss the rest of the season due to a torn Achilles tendon, a source confirmed to ESPN NFL Insider Adam Schefter. Mathis, who currently is serving a suspension for violating the NFL's policy on performance-enhancing drugs, suffered the injury last week while working out, the source confirmed to Schefter. Indianapolis coach Chuck Pagano acknowledged Monday that Mathis has an Achilles injury but would not confirm that the ligament is torn or that the linebacker is out for the season. Read more http://espn.go.com/nfl/story/_/id/1...s-rest-season-tearing-achilles-tendon-workout