2-3 Single Mug

2-3 Single Mug is a defensive set inside the Dime formation, running Dime 4-1-6 personnel: two defensive ends, two interior tackles (RDT and NT), a single subbed linebacker (SUBLB), and six defensive backs including a slot cornerback (SLCB). The "Single Mug" tag is the key visual: the lone linebacker walks up and sugars the A gap over the center rather than sitting at depth like a standard Dime 2-4 or 3-2 alignment. That one adjustment changes everything about how the set plays out pre-snap, because the offense is looking at what appears to be a five man pressure front with only one true box defender behind it.

Compared to other Dime sets in the formation, 2-3 Single Mug gives you the widest gap between disguise and actual coverage. The mugged linebacker can drop to the hole, spin out to a buzz flat, or actually come through the A gap, and the offense cannot tell which until the ball is snapped. Coverage calls like Cover 1 Hole, Tampa 2, Cover 4 Palms, and Cov 3 Buzz Show 1 all start from that same shell, so a quarterback reading the mug look has no reliable pre-snap key for where the middle of the field is going. Meanwhile the four man front with RLE, RRE, RDT, and NT keeps a legitimate rush without asking DBs to generate pressure.

The six defensive back personnel is what creates the matchup control. With SLCB on the field plus two extra safeties, you can put dedicated bodies on every trips and bunch receiver instead of leaning on a linebacker in man coverage. Bracket Switch Willie and Double Bracket let you double team the opponent's primary slot or X receiver while the rest of the coverage plays honest, which is exactly what you want against one hot user target. The pressure package (DB Blitz, Dbl Safety Blitz, Blitz Tex 3, Dime Blitz 2, DB Blitz Tex 3, 1 LB Dog) sends bodies from the same mug shell, so the pass rush and the drop coverages are indistinguishable until the snap.