It may not be long before Patriots quarterback Tom Brady tells Steelers coordinator Keith Butler to "study the rule book and figure it out."

Butler made an appearance on Steelers.com's Coodinators' Corner show this week and hinted that the Patriots do things that border on illegal, seemingly referencing their use of odd formations in the Divisional Round of the playoffs two seasons ago as an example.

"I don't think they're doing anything special," Butler said when asked why it's so difficult to prepare for the Patriots offense. "I think sometimes they do things outside the box sometimes, you know, that might be on the edge of being legal or not legal.

"They've done a couple of things in the past . . . putting an offensive tackle out as ineligible but he's not really. And so sometimes the emphasis by the NFL in terms of what they call and what they don't call, they use that a little bit. And they've been accused of doing a lot of things. But the thing we've got to do is ignore that and play, and hopefully we can give them something they haven't seen from us."

After the Patriots ran their unusual formations against the Ravens in January of 2015, Baltimore coach John Harbaugh insisted that no one had ever seen those formations before, and he was certain the league would look at their legality. Reacting to Harbaugh's comments that night, Brady defended his team's tactics.