NFL coaches preach discipline and there is good reason for it. Just look at the penalty report from the 2015 season for proof.
The four most penalized teams in the NFL last year – the Buffalo Bills, Tampa Bay Buccaneers, Oakland Raiders and Miami Dolphins – were all non-playoffs teams. Combined, those three teams went 27-37 with only the Bills among them reaching .500. The Bucs and Dolphins were both 6-10 and last in their respective divisions, and the Raiders were 7-9 and third in the AFC West.
Those four teams were the only ones to have more than 150 penalties called against them during the regular season, with the Bills leading the way with 169.