While there are obvious similarities in most offensive systems, it is important to understand that no two offensives, in terms of terminology, are the same. Terminology, as I see it, is primarily the best compromise of three factors:
Backs and Receivers Terminology. Each of the backs and receivers is represented by a letter for purposes of play-calling.
1. F - running back, a fullback in two-back formations;
a halfback/tailback in single back situations
2. H - multi-purpose back, a halfback/tailback in
two-back formations; a wing/slot/flanker and lead blocker with motion
in single-back formations
3. X - WR, split, sometimes used as a second tight
end
4. Y - TE, sometimes used in a "Flex" (split) position
5. Z - WR, wing/slot/flanker
Formation Locations.
1. In all two-back sets, the F is the fullback and
the H is the halfback or tailback.
2. In all single-back sets, the F is the single
back and the H is the inside wing/slot/flanker receiver on the playside
or the weakside wing/slot/flanker
3. The X is the furthest receiver on the LOS opposite
the Y
4. The Y is the weakside LOS receiver in any no
TE formations; the TE in any single TE formations; the playside TE in any
double TE formations
5. The Z is always the wing/slot/flanker receiver
on the playside furthest from the ball