USC QB Matt Barkley ran a 4.91 and 4.98. Nickell Robey broke 4.4 in his first 40 and then went 4.46 on his second with a slight stumble. So he did much better than at the combine.
Curtis McNeal ran a 4.55 in the 40. Former USC tailbacks Stafon Johnson and Chauncey Washington are also working out for NFL teams today.