The Jaguars welcomed back linebackers Paul Posluszny (abdomen) and Telvin Smith (ankle) and cornerback Aaron Colvin (illness) to practice Thursday.

The three veteran defensive players missed Wednesday's session to due to their respective ailments.

Colvin, Posluszny and Smith were limited in their return to practice. However, all three are trending in the right direction to play Sunday at Heinz Field against the Pittsburgh Steelers.

Rookie linebacker Blair Brown (ankle), who was injured on Wednesday, failed to practice Thursday. He was seen using crutches and wearing a walking boot following the team's first practice of the week.

Jaguars head coach Doug Marrone chose not to be specific about the severity of Brown's injury.

"He's not going to practice today and we'll get him going tomorrow," Marrone said prior to practice.

Along with Posluszny, Colvin and Smith, cornerback Jalen Ramsey (Achilles) was also a limited participant in practice.

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Jaguars preparing for Antonio Brown

Even though he has been battling a calf injury since Week 15, the Jaguars expect Steelers wide receiver Antonio Brown to bring his best on Sunday. The veteran wide receiver led the league in receiving yards, despite missing the final two games of the regular season.

"Antonio is one of best receivers in the league," Ramsey said Thursday.

"He can do it all, he's an all-around receiver. Good routes, good hands, just a good player, he knows how to play ball."

Brown caught 10 passes for 150 receiving yards against the Jaguars in Week 5. Jaguars defensive coordinator Todd Wash knows Brown has the ability to change the game at Heinz Field this weekend.

"Game-changer, game-wrecker, whatever classification you want to put him in," Wash said.

"He can score from any place on the field. Obviously, they do a good job of taking some shots on the outside with him and [Steelers quarterback Ben Roethlisberger] throws a great deep ball, so it's a situation where we have to do whatever we can to stay on top and keep him in front of us. But at the same time, we'll catch a jailbreak screen and take that for 60 [yards]."

Brown also has the ability to return punts. He can be electric in that area of the game, so special teams coordinator Joe DeCamillis is also preparing for the possibility that he is on the field during punting situations.

"He's like the best in the world [at returning punts]," DeCamillis said.

"He's scary when you watch him. He's a guy that can - what I call a 'game-wrecker' - because all of sudden you've got a tackle, you think, then he's running it to the house. It's going to be a real challenge for us. He's a real competitor too."

More News and Notes

- The Jaguars announced they will host the Philadelphia Eagles in London in October. This will be the Eagles' first trip to London.

- Jaguars offensive coordinator Nathaniel Hackett on quarterback Blake Bortles' mobility:

"It's one of those things, the great thing about Blake is he has these legs on him that can really change the momentum of a game. It just came down to going into the wind, if he had a clean shot at it, a clean, perfect throw, go ahead take it. If not, take off and run. He started doing that very well and kind of switched some of those read-options and he made things work. That's the good thing about Blake, he makes things work."

- DeCamillis on kicking and punting at Heinz Field:

"It's kind of a swirling wind. Must not have been too hard for [former Jaguars kicker Josh Scobee] because he ended up winning the [wild-card round] game for us in 2007, so it was pretty easy for him that day. It's going to be a tough place to kick, no question."

Follow Mike Kaye on Twitter at @Mike_E_Kaye.