NAPA — Denarius Moore sat out the second half of practice Saturday because of a right-hamstring strain, which virtually assures there will be no replay of last year’s transcendent training-camp performance.

Moore’s Napa exploits were used as momentum toward a rookie season in which he caught 33 passes for 618 yards, averaging 18.7 yards per reception, and a team-high five receiving touchdowns.

“It’s a little frustrating coming in, knowing that you have an injury, watching your teammates practice, going through it and grinding,” Moore said. “It’s something you can’t control, and you’ve got to sit back and just let it heal on its own.”

Moore injured the hamstring during the club’s mandatory minicamp six weeks ago and said he was fully healed — only to reinjure it during the second practice of training camp.

Raiders coach Dennis Allen, having faced Moore as defensive coordinator for the Denver Broncos last season, doesn’t need to see the receiver relive his training-camp exploits at the expense of his health.

“I got a chance to see him last year up close and personal, so I know what type of player he is and what he’s capable of being,” Allen said. “Those hamstrings can be a nagging deal, so we’re going to be cautious and make sure we’ve got him ready to go come the Monday night opener.”

Moore conceded he surprised himself with his performance as a rookie, but he has put it behind him.

“I just have to let it go, because it’s a new year and I expect more from myself, just like the team expects more and the coaches expect more,” Moore said. “It’s just got to be more.”

Starting right cornerback Shawntae Spencer has been seen trailing open receivers for the early portion of training camp. “I think he’s been a little up and down in camp,” Allen said. “We’re going to continue to push him and see where he’s at. I’m not pushing the panic button with him. Obviously with all these guys we want to continue to see some improvement.”

Approximately 1,000 fans viewed practice, with the final public session Sunday for those with tickets.