Zone or Duo?! memes have become popular over the last few years for NFL film enthusiasts. With the Jacksonville Jaguars running both concepts this preseason, Big Cat Country is here to help uncover the differences (and similarities) between the two plays.
The confusion comes from how similar the plays look. These similarities include the downhill nature of each concept, how they mostly run from single-back formations, take place between the tackles, and how the runner occasionally cuts back against the grain. These all play a factor in the difficulty of determining the play call.