Antonio Smith has been remarkably healthy playing a physical game. The defensive lineman has missed one game in the last eight seasons -– he’d want me to knock on wood here, so I’ll oblige -– leading up to age 32.

Then, just a few weeks after signing with the Raiders, he was sidelined for the entire offseason program after surgery to fix something unspecified. After Saturday afternoon’s practice at the Napa Valley Marriott, Smith solved the case of the mysterious ailment with some good news.

He had sports hernia surgery, and is already back to 100 percent.

“I knew I was going to be just fine, but it threw my offseason out of whack,” Smith said. “I wasn’t able to do what I normally do, but I’m better now and I’m ready to play.”