Trailing by five with two minutes remaining, Jacksonville faced a fourth and 3 from the Chiefs’ 32.
It had been a miserable day in many ways for the Jaguars: four turnovers, many missed connections in the passing game and an apparent rushing touchdown denied by a fumble that was held up after a lengthy review.
But a conversion here and the Jags could have been on their way to an improbable victory at Arrowhead Stadium.
That’s when slot cornerback Steven Nelson went into a state of denial.
Jacksonville wide receiver Bryan Walters came across the middle and ran a route with enough turf for a first down.