At some point, someone always asks Charles Woodson for some health tips or secrets. After all, the 38-year-old is throwing his body around for the Oakland Raiders on a weekly basis, and the safety actually seems to be getting better with age.

On Wednesday, Woodson was named AFC defensive player of the week, for his role in last week’s win over the Chiefs, which snapped Oakland’s 16-game losing streak.

“I feel great,” Woodson said. “Why that is … I have no clue. Guess I am just blessed.”

He even still eats fast food. “Not too much, but I eat it,” he said. “I eat whatever.”

Woodson, in his second year of his second stint with the Raiders, doesn’t want to get too far ahead of himself with five games remaining. But if he feels as good at the end of the season as he does now, he is coming back for an 18th season.

“No question,” Woodson said.

Woodson had nine tackles (three for a loss), a sack and broke up a pass in the Raiders’ 24-20 win over the Chiefs Thursday night. He also became the first player in NFL history to have 50 interceptions and 20 sacks.

“He never ceases to amaze me,” assistant defensive backs coach Marcus Robertson said. “He is still one of the best players in the NFL and he could play a long time.”

Interim coach Tony Sparano was asked if he would be surprised if Woodson played into his 40’s.

“No … that’s hard to say, it really is,” Sparano said, smiling. “But no.”

Woodson gives a lot of credit to Robertson, the former All-Pro safety for the Oilers who is in first year on the staff.

“He’s really helped me see the game better,” Woodson said. “He’s been a great teacher. For myself, being the great athlete that I am, it takes a lot for me to really listen to you. If I think you know what you are talking about, I am going to listen.

“This is a guy that I know knows the game.”

Robertson said that’s been his biggest surprise dealing with a future Hall of Famer as well.

“He’s coachable,” Robertson said. “He’s played cornerback and nickel, but he wants to be the best free safety in the league. He trusts what I tell him, how to see things on the field, and he is getting better and better every week.”

The chip on Woodson’s shoulder definitely helps his focus.

Despite eight Pro Bowl appearances and a Super Bowl ring with the Packers, Woodson didn’t get any other serious offers from teams when he signed one-year deals with the Raiders the last two offseasons.

Next offseason, when he decides to play again, Woodson said he would like to come back to Oakland because he has unfinished business here.

“No question,” he said. “It would mean a great deal to play here and to get back into the playoffs and have a chance at going to the Super Bowl. Coming into this season, I had all the confidence in the world that we would be a much better team than what we are.”

Woodson said he still believes in the process, and would have the same confidence in the Raiders next season.

“I believe that they are going to continue to bring in the right people,” he said. “The draft class that they brought in this year was a great draft class. You bring in a few more people in free agency, and who knows what can happen.”

Woodson pointed to the Chiefs, who were 2-14 in 2012 and 11-5 and in the playoffs the next season.

“It can turn fast,” he said. “It takes a few players here and there, and for guys to buy in. Who knows what can happen?”

Who knows? Defensive backs could even play into their 40’s.

Briefly: Running back Latavius Murray returned to practice on a limited basis, but still has to pass the last level of his concussion tests to be cleared for Sunday’s game in St.Louis. … Oakland put tight end David Ausberry (foot) on injured reserve and called up defensive tackle Ricky Lumpkin from the practice squad.