In a 3-4 Defense OLB drop off sometimes when zone-blitzing. They do it in San Fran, you'll see Aldon Smith or Ahmad Brooks drop off and overload the opposite side to try and get a free shot on the QB. They still usually rush 80+% of the time.
Sam McCord - Figueroa - Owens
SDE Chickillo - Hamilton - Kamalu
NT Wyche - Heurtelou - Jenkins
DT Pierre - Kamalu - Moten
Jack AQM - Thomas