Nomenclature - J

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TermDefinition
JabA fake step intended to alter how the opponent plays, i.e. a step in one direction to pull a blocker or defender in a certain direction before attacking in the other direction
JamAn alignment in a 4 DL defense in which the DE aligns head-up over the TE and has C-gap responsibility or is two-gapping
Jam CoveragePress coverage in which the coverage impacts the receiver upon his release off the LOS
Jerk RouteA type of route in which the receiver initially looks like he is going to run a short dig, before breaking inside on a shallow crossing route.
JokerA defensive back player moving into the box as an extra run defender.

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