How do you account for the unaccountable? For those times when a 6-foot-5, 237-pound receiver leaps over a cornerback to snatch the ball in midair before gracefully gliding his toes along the end zone. Or when he lays out, nearly parallel with the ground, for a touchdown grab. Or when he uses his 4.35-second 40-yard dash speed in a game to skate by a defensive back with ease and disregard.
How do you handle Calvin "Megatron" Johnson, a ninth-year wide receiver who has the nickname of a Transformer and the paycheck of a major-league slugger?
They're questions NFL defenses have tried to answer for years now.