WHO? 2009 New York Jets
WHAT? Oh, the Jets were breaking all sorts of rules during Mike Tannenbaum’s six year reign (2006-2012) as general manager. For the most part it was nothing that might directly influence the outcome of specific games. They just falsified injury reports (pertaining to Brett Favre) and tampered with free agents (most notably Michael Crabtree).
Actually, come to think of it, the Jets are still doing that stuff. The Patriots, of all teams, recently accused the Jets of tampering after team owner Woody Johnson made remarks about Derrell Revis. Maybe Johnson, not Tannenbaum, is the one who doesn’t get and/or respect the rules
http://www.totalprosports.com/2015/...er-cases-of-nfl-cheaters-caught-red-handed/#2