COSTA MESA — Chargers cornerback Jason Verrett has been ruled out of Sunday’s home opener against the Dolphins, a potentially ominous sign for a player less than a year removed from ACL surgery.

Chargers head coach Anthony Lynn said Verrett’s knee will be evaluated on a “week to week” basis.

“He’s done everything possible to get back and be at 100 percent,” Lynn said. “Right now, we’re just not liking what we see, so we’re going to rest it for a while. … I just know the way Jason likes to play the game. Right now, he can’t play that way.”

Verrett, a 2015 Pro Bowler, played on 63 of 69 defensive snaps in Monday’s season-opening loss to the Broncos. He practiced Wednesday, but was held out Thursday and Friday.

The Chargers had been working Verrett back into the rotation slowly since he underwent reconstructive last October. The 26-year-old began training camp on the physically unable to perform list, and only played two series in the preseason.

Lynn did not rule out the possibility that Verrett — who has yet to play a full season in the NFL since being selected in the first round of the 2014 draft — could sit out the rest of the year.

“We always have a plan for that,” Lynn said. “But if he can make it back, that certainly would help.”

At least this weekend, Verrett’s absence will be filled by Trevor Williams, who started five games last season as an undrafted rookie. An all-conference honorable mention at Penn State, Williams entered this fall as the team’s primary nickelback.

“I’m pretty sure he’s frustrated,” Williams said of Verrett. “In that offseason, he worked extremely hard to get back into the rhythm of things. My prayers go out to him. I told him I got his back, and now I’ll go out there and make sure I represent. But he’ll be back.”

Williams’ move to the outside also opens up additional reps for fifth-round pick Desmond King. A preseason standout for the Chargers, King played only three defensive snaps in his NFL regular-season debut.

The Chargers are also considering moving undrafted rookie Michael Davis up from the practice squad.

The team did get some good news on Friday’s injury report, welcoming rookie receiver Mike Williams back to practice for the first time since rookie minicamp. The No. 7 overall pick had been sidelined since May by a herniated disc in his lower back, but said he is no longer feeling any pain and is targeting an October debut.

Williams won’t play at StubHub Center this weekend, but he caught a pass from quarterback Philip Rivers for the first time during individual drills.

“It’s crazy,” Williams said, when asked about his prolonged absence. “It wasn’t how I had this planned out, but I’m just going with the flow. Everything happens for a reason. I’m just trying to learn the offense right now, get in shape, be ready to play when my time comes.”

Rookie safety Rayshawn Jenkins (concussion) was also ruled out for Sunday.

Receiver Dontrelle Inman, defensive end Jerry Attaochu (hamstring) and tight end Sean McGrath (knee) were full participants in practice this week, but were still listed as questionable to play the Dolphins. All three were inactive for Monday’s season-opening loss in Denver.