Cornerback Trumaine Johnson had been a participant during last week's organized team activity practices, but opted to miss Tuesday's session.

"It's a situation where I continue to remind people that it is voluntary. We're not sure where Trumaine was today, but it is voluntary," head coach Sean McVay said after practice. "I'm sure we'll find out specifically because he's done a great job this offseason communicating and being here every day. I'm sure we'll find out a little bit more moving forward."

Stressing that these practices are not mandatory, McVay said he wouldn't characterize Johnson's absence as frustrating.

"Trumaine's been excellent this offseason program," Certainly, it was one of those things where you get out on the field and maybe there's something that's happened since then — I don't have my phone on me. But it is voluntary, and I think that's something that's important for us to remember. Certainly you like it when all your guys are here."

McVay said he hadn't heard anything as to whether this could be a contract-related absence for Johnson, adding he didn't think that was the case. Defensive tackle Aaron Donald has been absent from Phase III of the offseason program as well, which general manager Les Snead confirmed last week is related to his contract. On Tuesday, McVay said there's nothing new on when Donald may return.

If there is a silver lining to Johnson's situation, it's who the team was able to see and evaluate in his stead.

"I thought the guys who stepped up in his absence today did a nice job competing," McVay said. "You saw good things from E.J. Gaines, Nickell Robey[-Coleman]. That's the thing you like about your secondary, with the depth that we do have."