Playbooks
FB Dive out of the Flexbone Normal formation is a pure downhill run play that hands the ball directly to the fullback lined up in the backfield, attacking the A gap immediately at the snap. The blocking scheme relies on the offensive line firing off with double teams at the point of attack and the wingbacks/slotbacks cutting off pursuit from the edges, while the QB fakes the mesh point to hold the linebackers. This is a straight run play, not a play-action or RPO, and the primary read progression for the ball carrier is inside first, hitting the A gap crease off the double team before bouncing to the B gap if the interior is clogged.
Identify the defensive tackle alignment before the snap, since a shaded nose tackle in the A gap can blow up the dive before the double team forms. Watch linebacker depth at the snap, if the Mike and Will are sitting back in read-and-react mode instead of flowing downhill, the crease will close faster. This run gets stopped cold by gap-sound run fits and defenses that spy the fullback with a user-controlled linebacker sitting in the A gap. Look for safeties creeping down into the box pre-snap, which signals run support and a potential eight-man front designed to stack the point of attack. Post-snap, key the backside linebacker's pursuit angle, since a slow-flowing or frozen linebacker due to the option fake is exactly what makes this play hit for explosive yardage.
Call this on early downs or short yardage situations like 3rd and 1 to punish defenses sitting in light boxes or run blitzes without gap discipline.
Check pre-snap for a base 4-3 or 4-4 look with linebackers stacked tight, since this play thrives when defenders are already crashing downhill.
Use audibles to check into FB Toss or Wb Dive if you see the defense overloading the interior gaps, keeping the defense honest with the misdirection built into the Flexbone option family.
Pair this with Midline Triple Option and Inside Veer Triple Opt in your play-calling sequence so the defense has to respect the dive before the QB keeps or pitches, creating hesitation in linebacker fills.
Avoid calling this into stacked nine-man fronts or heavy blitz packages that show A gap pressure pre-snap, since there is no time to build the double team.