Chargers' Donald Butler sits out again

SAN DIEGO – San Diego Chargers middle linebacker Donald Butler missed practice for the second day in a row, bringing his availability for Sunday’s game at Washington into question.

Although Butler did not practice with his teammates on Thursday, he did work with a trainer on agility drills on a side field. Butler missed the last two games due to a groin issue.

Along with Butler, receiver Eddie Royal (toe) and offensive lineman Michael Remmers (ankle) also did not practice. Royal did not practice for the entire week heading into the Jacksonville game two weeks ago but still played.

Offensive lineman Chad Rinehart (toe) was a limited participant for a second straight day. Outside linebacker Jarret Johnson (hamstring) and Eric Weddle (toe) were full participants again on Thursday.

Reserve linebackers Andrew Gachkar and Reggie Walker have filled the void in Butler’s absence. Gachker played 42 snaps in San Diego’s win over Jacksonville; Walker subbed in on passing situations, playing 19 snaps. Chargers defensive coordinator John Pagano said the duo has been solid playing specific roles while Butler is out.

“They’re doing great,” Pagano said. “They’re like sponges. They soak everything up, and then we take the sponge and we squeeze everything we can get out of them. And they just want to give it to you all. They’re doing a great job of truly understanding it.”

Walker said he’s focused on improving each week.

“I think I’ve done pretty good,” Walker said. “There’s always a couple things I wish I could have done better. But for the most part I’ve done OK. I’m just trying to get better each and every week, and get a better understanding of what we’re supposed to be doing.”