In light of the call of the line-overload rule last Sunday, The Associated Press talked to NFL vice president of officiating Dean Blandino about some rules that fans may not know, including some player safety rules.
For instance, The AP explained the recent "push" call against the New England Patriots.
Also, did you know there's a "roughing-the-holder" penalty?
And then there's the rule that gives the referee complete discretion to call, the "palpably unfair act."
-- Bill Bradley, contributing editor