Raiders edge rusher Khalil Mack missed Wednesday’s practice, not necessarily by choice. He rested a sore hamstring strained late in Sunday’s victory over the New York Jets, one few people are stressed over.

Head coach Jack Del Rio didn’t consider it serious after the game. Mack wasn’t worried about it after watching practice.

“I’m okay. We’re just being really cautious,” Mack said in a Wednesday evening interview with SiriusXM NFL Radio. “It’s just a little hamstring tweak. We’re being cautious with it early in the week by resting it. We just don’t want to re-aggravate it too soon. We’re taking some time with it. I’ll be out there tomorrow, full force.”

Mack is one tough cat, and doesn’t miss many snaps. That’s a good thing for the Raiders, who rely on Mack to defend the run well and get after the quarterback.

The second-year pro has excelled at both tasks – Mack already has 27 tackles, four sacks, 29 other quarterback pressures and a forced fumble -- and will need to do well in Sunday’s high-octane matchup with the host Pittsburgh Steelers.

“We’re excited about Sunday,” Mack said. “It’s another opportunity show that we are in fact getting better every week.”