Pittsburgh starting offensive tackle Willie Colon suffered a torn Achilles, a league source told ESPN NFL Insider Adam Schefter. Colon will have more tests to confirm the injury on Tuesday, but the Steelers believe Colon needs surgery and five to six months of rehab, the source said. "It looks like it's an Achilles [injury]," Colon's agent Joe Linta said. "We want to wait to confirm it, but that's kind of our worst fears."