LAS VEGAS — Oakland Raiders wide receiver Javon Walker could be released from the hospital today, a day after he was beaten, robbed and left unconscious on a Las Vegas street after a night of partying, police said.

A large amount of cash and some jewelry were taken from Walker, who suffered "significant injuries," police said.

Police Lt. Clinton Nichols said detectives are retracing Walker's activities in the hours before he was found injured Monday morning on a street off the Las Vegas Strip.

"That's one of the first things we do, backtrack what he did and where he stayed," Nichols said, adding that the investigation was still in the early stages. "We knew there was a large amount of cash taken, and some jewelry."

According to reports published today in the Las Vegas Review-Journal, Walker visited a nightclub, Tryst, at the Wynn Las Vegas resort on Saturday night. He spent Sunday night at another club, Body English at the Hard Rock hotel-casino, before leaving about 3:30 a.m. Monday, according to casino spokeswoman Dorian Cantrell.

Photos posted on the Web site TMZ.com showed a person identified as Walker at Body English spraying pink champagne into the crowd.

Cantrell said there were no reports of a disturbance at the club.

Nichols said he believed Walker would be released after a 24-hour stay at Sunrise Hospital and Medical Center. Hospital spokesman Dan Davidson said he had no patient listed under Walker's name.

A Raiders spokesman said the team was in the process of gathering information and had no further comment.

On Monday, police Officer Bill Cassell said in a statement that Walker was taken to a hospital with "significant injuries" and was in fair condition at the hospital.

Walker, 29, signed a six-year, $55 million deal with the Raiders after being released by the Denver Broncos in February.

Walker injured his right knee for the second time in his career last season and was limited to eight games and 26 catches in 2007.

Walker was a first-round draft pick by the Green Bay Packers in 2001 and had a breakout season in 2004 with 89 catches for 1,382 yards and 12 touchdowns.

He tore a ligament in his right knee the next season and played only one game.

He was traded to Denver in 2006 and bounced back with 69 catches for 1,084 yards and eight touchdowns.