JACKSONVILLE – Allen Hurns' status remains unknown.

That may mean a larger role Sunday for another Jaguars receiver, but it certainly leaves the team's receiving position in a more uncertain situation than previously has been the case this season.

Hurns, a starter in the first 11 games who is on pace for more than 1,000 yards receiving this season, missed practice Wednesday after sustaining a concussion late in the Jaguars' loss to the San Diego Chargers at EverBank Field this past Sunday.

Hurns remains in the concussion protocol and is uncertain for Sunday against Tennessee.

"That's a day-to-day (situation)," Head Coach Gus Bradley said as the Jaguars (4-7) prepared to play the Titans (2-9) at Nissan Stadium in Nashville, Tennessee, Sunday at 1 p.m.

"It's hard to comment (on) guys who are in the concussion protocol. We'll just wait to see from the experts and the information they give to us and go from there."

If Hurns doesn't play, Bradley said there's a good chance second-year veteran Marqise Lee could start in his place.

"He's doing everything right," Bradley said of Lee. "If Hurns is out, he gets even a greater opportunity."

Lee, a second-round selection in the 2014 NFL Draft and the earliest-drafted receiver on the Jaguars' roster, missed six of the first eight games this season with a hamstring injury. He has five receptions for 51 yards this season, including two for 11 yards since returning from the injury three games ago.

Lee was targeted five times against the Baltimore Ravens in his first game back from the injury on November 15, but has been targeted just once in the last two games.

Bradley on Wednesday compared Lee's situation to that of tight end Julius Thomas, who missed the first four games of the season with a hand injury then needed several games to gain chemistry with quarterback Blake Bortles and get his conditioning to optimum playing level.

"You just saw him (Thomas) get better and better, and then last week I said you saw in practice that he looked good – he looked like the Julius Thomas we saw earlier (early in training camp and the offseason)," Bradley said. "I think Marqise is going through a little bit of that but he's getting closer."

Bradley said Wednesday he believes Lee is ready to handle a more extensive play count Sunday if necessary.

"We've been really guarded with him in how we've monitored the reps," Bradley said. "Now, it's at the point where we've taken the harness off a little bit on him.''

Hurns was among several Jaguars players held out of practice Wednesday.

Wide receiver Bryan Walters (back) also did not practice Wednesday, nor did safety Johnathan Cyprien (abdomen), defensive end Chris Clemons (veteran day off), running back Toby Gerhart (groin), Otto linebacker Dan Skuta (groin) and tight end Marcedes Lewis (ankle).

Of Cyprien, Bradley said, "I feel pretty good about him. I think it's more, 'He's sore,' and we'll take that one day to day."

Walters, Cyprien, Clemons, Gerhart and Lewis all were active Sunday against San Diego. Skuta missed the Chargers game, the second game in the last three he had missed with the injury.

Safety Josh Evans practiced limited in a red, non-contact jersey Wednesday and is in the concussion protocol after sustaining the injury against the Chargers. Rookie wide receiver Neal Sterling also remained limited after missing Sunday's game with an illness.

Kicker Jason Myers worked limited Wednesday with a back injury. He reported the situation to the team on Monday. Bradley said no decision had been made as of Wednesday on what to do in terms of signing a kicker if Myers is unable to work Thursday.

"(General Manager) Dave (Caldwell) and I talked about it," Bradley said. "We'll see how he goes day to day, but I think the arrow is up on it."

Also on Wednesday, the Jaguars worked the final three sessions of practice in heavy rain.

"It was good," Bradley said. "We haven't had a practice in rain like that, and I know the last game in Tennessee (this past Sunday) against Oakland the second half was a downpour. So, it was good for many reasons for us."

Bradley also said a focus Wednesday was "mastering the obvious," meaning working on areas in clear need of improvement. He said those areas include red-zone offense and third-down conversions, areas that have hurt the team in recent weeks.

"That really has been our theme this week as far as bringing those points up and saying, 'Hey, we all know what we need to do,''' Bradley said. " 'Let's go out there and master it with each rep and each thing we do in practice.'

"That was really our intent. It was a good practice – very pleased with how it went."