JACKSONVILLE – All signs point to Paul Posluszny playing Sunday.

That's good news for a Jaguars defense that struggled without him last week, and as far as Posluszny is concerned, he believes he will play Sunday "unless we had a big-time setback."

"I feel really good and feel like I should be able to (play)," Posluszny said Thursday as the Jaguars (1-4) prepared to play the Houston Texans (1-4) at EverBank Field Sunday at 1 p.m.

Posluszny, who missed last Sunday's loss to Tampa Bay with a high-ankle sprain, was one of three Jaguars starters returning to practice Thursday after missing Wednesday. He returned on a limited basis, while right tackle Jermey Parnell (knee) worked full and wide receiver Allen Hurns (ankle/thigh) also practiced limited.

Posluszny said while he didn't take full repetitions he participated in all practice periods.

"He went through pretty much most of the practice," Jaguars Head Coach Gus Bradley said.

The Jaguars, after ranking fifth in the NFL against the run through four games, allowed the Buccaneers 183 yards rushing in a 38-31 loss Sunday. Bradley was asked how good it was to see Posluszny practicing Sunday.

"Very good," he said, smiling.

Quarterback Blake Bortles worked full a second consecutive day Thursday, as did defensive tackle Sen'Derrick Marks. Bortles sustained a Grade 1 AC joint sprain against Tampa Bay, but all indications are he will play against Houston.

Marks' practice Wednesday was his first full practice since undergoing January reconstructive knee surgery.

Running back T.J. Yeldon, who missed practice for a second consecutive day with a groin injury, said afterward he did some running during practice. Bradley said after practice Yeldon had not been ruled out for Sunday.

"They said at the beginning of the week it could be day to day," Bradley said of Yeldon, who has started all five games this season while rushing for 291 yards on 81 carries. "We'll see."

Bradley said Yeldon could be a game-time decision even if he doesn't practice this week.

"We'll see," Bradley said. "He's a guy in meetings that can pick things up really fast. Football comes very easy to him. It seems to come pretty fast to him; if he has that opportunity, we'll see."

Defensive end Chris Clemons worked full after a veterans day off Wednesday, with cornerback Aaron Colvin (shoulder), tight end Julius Thomas (hand) and running back Denard Robinson (knee) also practicing full for a second consecutive day.

Robinson has missed the last three games with a sprained medial collateral ligament.

"His big thing, I think, is conditioning (returning from the injury)," Bradley said of Robinson. "I think these last two days have been good for him. Everything looks pretty good for him."

Robinson, a starter in nine games last season, could be available to start Sunday if Yeldon can't go. The same is true of running back Toby Gerhart, a starter in seven games last season. Robinson was the top backup before his Week 2 injury while Gerhart has rushed for 10 yards on just five carries this season.

Offensive lineman Luke Bowanko (stinger), defensive tackle Abry Jones (knee) and offensive tackle Sam Young (illness) all worked full Thursday, and cornerback Davon House worked limited for a second consecutive day with a hip contusion.

Wide receiver Marqise Lee (hamstring), running back Bernard Pierce (concussion) and safety James Sample (shoulder) all missed practice for a second consecutive day Wednesday.