In the span of a few short months, Timothy Bradley Jr. has been transformed from a virtual unknown into a dangerous opponent who has a legitimate shot to topple welterweight champ Manny Pacquiao on Saturday in Las Vegas. The spin-mongering of the promotional machine driving the show had a hand in the metamorphosis, but in any case it's all perception. Then, as now, Bradley (28-0, 12 KOs) is a young, unbeaten titlist in a rough-and-tumble division who has a diverse skill set and a bottomless gas tank. Save for perhaps Juan Manuel Marquez, that's a far more formidable challenge than anything Pacquiao (54-3-2, 38 KOs) has faced in recent years.
Below, our panel of ESPN.com boxing experts picks the winner of the main event, predicts the knockout of the night and pinpoints the fighter each believes has the chance to help himself more than any other on Saturday.