The Detroit Lions have officially established themselves as a legitimate threat in the NFL, and their NFC North rivals have certainly taken notice. After the Lions exploded onto the scene last season, the Green Bay Packers, Chicago Bears and Minnesota Vikings all made moves with players who can attack the strengths and weaknesses of Detroit.
The Bears, Packers and Vikings always post a problem for Detroit no matter the record. Now with the emergence of the Lions, it's important for them to stay on top of the NFC North.
It will take top-notch team play to beat their inter-division rivals, but it will take a consistent effort from five specific players to keep them on top. Here are the four Detroit Lions who must always be on their A-game against NFC North competition.