Oakland Raiders cornerback D.J. Hayden underwent foot surgery due to a stress fracture.

He's out four to eight weeks.

He's on the physically unable to perform list.

Hayden was drafted in the first round last year.

“It’s a big setback,” cornerback Charles Woodson said. “As I’ve said many times, the most important thing in this game is being out on the field. There’s only so much being in the film room and studying plays can do for you. It can only take you so far. You need to be out there.

“Hopefully it’s not anything that’s going to hold him out the whole camp. He’s a guy we feel can help us out around here. It has the potential to be a setback. Hopefully it’s not.”

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Aaron Wilson covers the Ravens for The Baltimore Sun