ALAMEDA — Raiders coach Jack Del Rio said he hopes to get running back Latavius Murray and linebacker Malcolm Smith back this week, while defensive end Mario Edwards Jr. is also on track for a timely return.

Murray (toe) and Smith (quad) both missed Sunday’s game against the San Diego Chargers while Edwards remains on injured reserve with a hip injury. Edwards is eligible to resume practicing next week and could return to play Nov. 6 against the Denver Broncos.

“He’s still working, doing his thing with the appropriate people,” Del Rio said of Edwards, who was injured in the first exhibition game. “Whenever he’s eligible to practice and he’s ready to go, then we’ll get him started.”

Murray was replaced Sunday by a committee of rookies DeAndre Washington and Jalen Richard, as well as fullback Jamize Olawale. They combined to average just 3.6 yards per carry.

“We hope to get him back,” Del Rio said of Murray. “The other guys did a solid job filling in. If we get Latavius back, we’ll welcome him back.”

Smith’s absence was filled by Perry Riley Jr., a six-year veteran of Washington who signed on Tuesday and delivered a season-high seven tackles, plus a forced fumble.

Smith dressed for Sunday’s game to be available in an emergency situation, so Del Rio is optimistic about his return. The Raiders also played without Clive Walford (knee).

“The guys that were injured, we’ll get them back as quick as we can,” said Del Rio, who was particularly pleased with how Riley filled in on such short notice.

“He came in, really attacked the preparation, tried to learn the language,” Del Rio said of Riley. “That’s the biggest thing. Basically anything you’re doing, he’s probably done before in his career over six years. We found some of the common ground and tried to put in our terms so he could learn as quick as possible. He worked hard at it and he played well, did a nice job for us, really stepping up and stepping in on short notice for us.”

Did Riley play well enough to have a shot at staying in the lineup when Smith returns?

“Whoever plays the best will play,” Del Rio said. “In Perry’s mind, he came in here to help anyway he could. … We’ll always let guys sort through competition, through effort and through production who the best combination will be.”

— Cornerback David Amerson had a rough day that included getting beat for a 29-yard touchdown by Tyrell Williams.

Del Rio acknowledged that on at least one play, Amerson didn’t get the help over the top from the safety that he should’ve, but also isn’t concered about a player that’s played very well until Sunday.

“Those kind of things are going to happen from time to time but it’s not going to happen very often with David,” Del Rio said. “I think he’s a really good football player. Like most corners do, you’ve got to put that in your rear view and have a really short memory and move on.”