In football, they say a cornerback is a man on an island, but the metaphor doesn’t quite fit. What he is, really, is an actor or dancer on a stage, delivering a performance on every pass that comes his way. Over all those plays, all those receivers he’s covering and passes he’s defending, he knows that some of his performances will be abject failures, that those failures are inevitable, and that when they happen, everyone will see them and they will be humiliating. A cornerback is not a lineman, his mistakes hidden by other massive men’s bodies. He is not a running back who sometimes selects the wrong sliver of space to try to slip through.