JACKSONVILLE – The Jaguars will finish the 2015 season without their starting running back.

They'll finish it without their leading tackler, too.

T.J. Yeldon, the Jaguars' leading rusher, and starting weak-side linebacker Telvin Smith will not play in the 2015 regular-season finale against Houston Sunday, the team announced Friday. Yeldon will miss a third consecutive game and Smith will miss a second consecutive game.

The team placed defensive tackle Abry Jones on injured reserve and activated defensive tackle Richard Ash from the practice squad.

Yeldon sustained a sprained medial collateral ligament against Indianapolis December 13 and Smith sustained a separated shoulder a week later in a loss to Atlanta.

"We'll have to adjust, but really since the beginning of the week we've had a couple of plans in place," Head Coach Gus Bradley said as the Jaguars (5-10) prepared to play the Texans (8-7) at NRG Stadium Sunday at 1 p.m.

Smith never had missed an NFL game or regular-season practice before this injury.

"It's [tough]," Smith said of not playing in the final two games. "Last year Poz [Middle linebacker Paul Posluszny] didn't finish the season and I wanted us to finish the season together. The competitor in me … it's frustrating. At the same time, you have to think about long-term and longevity. Because I plan on being in the league a whole, I'll do what it takes so I am."

Bradley said neither Yeldon nor Smith is expected to need offseason surgery. Smith said he expects to be ready for the offseason program.

"It's definitely a blessing that it's not too major," Smith said. "I should be ready in the next week or two. It's just a shame it was the last two games."

Denard Robinson has started the last two games in place of Yeldon, and Bradley said Robinson and Gray both likely will get repetitions Sunday. Robinson has rushed for 61 yards and 20 carries in the last two games and Gray rushed for 31 yards on five carries in a loss to New Orleans last week.

"I think you'll see them both play," Bradley said.

Linebacker Hayes Pullard, who started Sunday in place of Smith, was listed as questionable Friday with a hamstring injury. Jordan Tripp will start if Pullard can't play.

Right tackle Jermey Parnell, who did not practice Wednesday or Thursday with a hamstring injury sustained Sunday, was listed as working limited in Friday's walkthrough practice. He was listed as questionable and Bradley said he likely will be a game-day decision.

"I know he has improved; it's just how fast," Bradley said. "I know from (Thursday) to today (Friday), a big step. We'll see as we get closer."

Sixth-year veteran Sam Young would make his first start of the season if Parnell can't play. Parnell has started all 15 games this season.

Defensive tackle Tyson Alualu (ankle), defensive end Chris Clemons (not injury related), strong safety Johnathan Cyprien (thigh), wide receiver Allen Hurns (thigh), offensive tackle Luke Joeckel (back/knee), cornerback Demetrius McCrary (not injury related), defensive tackle Roy Miller (knee), defensive end Jared Odrick (quad) and wide receiver Allen Robinson (shoulder) all were listed as probable.

Bradley said Robinson and Hurns, each of whom have surpassed 1,000 yards and 10 touchdowns receiving this season, would play their normal roles and normal snaps rather than working reserves Marqise Lee and/or Rashad Greene into more situations.

 "I think it'll be pretty normal out there on the perimeter," Bradley said.