Just about every defense in the NFL has studied the Patriots’ Hybrid 12 personnel package (one running back, two tight ends, two wide receivers) to determine how many problems those two tight ends can create. Aaron Hernandez can line up as a wide receiver, a slot receiver, an inline tight end, a wing, a fullback or even a running back. Rob Gronkowski can line up as an inline tight end, a slot or a wing. No matter what defensive personnel is on the field, the Patriots can make you feel like you are in the wrong one. Play base personnel with a front seven and four defensive backs and they spread you out in a four-wide look. Play nickel defense with an extra cornerback subbing for a linebacker in the front seven, and they condense the set and run right at you. It’s a problem, and defenses are studying the Big Nickel concept for an answer.