If needed, Chris Prosinksi said he's ready.
And although the Jaguars' rookie safety said it may or may not have been true three months ago, he said Friday he feels he's prepared to start should the shoulder injury to Dwight Lowery keep the veteran from starting against the Tampa Bay Buccaneers Sunday.
Prosinski, a fourth-round selection by the Jaguars in the 2011 NFL Draft, worked with the starters Friday during the portion of practice open to the media. Lowery, a starter since Week 3, practice limited for a third consecutive day Friday.
Lowery is listed as questionable on the injury report.
"I've been getting some reps, and feeling comfortable with the game plan," Prosinski said Friday as the Jaguars (3-9) prepared to play the Tampa Bay Buccaneers (4-8) at EverBank Field in downtown Jacksonville Sunday at 1 p.m.
"If they do happen to call my number, I'll be ready to step in. It's a great opportunity."
Prosinski, who played collegiately at Wyoming, missed much of training camp and the first two preseason games with a hamstring injury. He has played in every regular season games, and in most games this season saw about 10-to-15 snaps.
That changed Monday against San Diego when he got his most extensive action of the season, registering a solo tackle while playing after Lowery's injury.
"He's definitely ready," Jaguars safety Dawan Landry said. "He's been making the calls in preseason and the whole season. It won't be a problem if he has to do it. You have to prepare as if he's going to start, because in this league you have to prepare as if you're going to be in."
Jaguars interim coach Mel Tucker, the team's defensive coordinator the past three seasons, said he feels comfortable with Prosinksi should Lowery not be ready, and said the game has slowed down for Prosinski as the season has continued.
"He's done a good job," Tucker said. "We've asked him to do certain things in certain packages and he has done a nice job with that. All year he has been in a lot of meetings, in a lot of practices and taken a lot of reps. I'm comfortable with him going in and doing what he needs to do."
Prosinski said he feels more comfortable with technique, footwork and eye progression, as well as the defensive calls and getting teammates lined up.
"I feel 100 percent more comfortable, obviously, than I did at the beginning of training camp," Prosinski said. "The progression has been there. It's unfortunate we had the whole situation in camp with the injury, but I feel good now. If my number's called, I'll be ready to do what I can.
"After 12 or 13 weeks, I feel like I've made a lot of progress."
*The Jaguars placed defensive end Aaron Kampman on injured reserve. Kampman registered four sacks in eight games last season, and after missing the first five games while recovering from the knee injury that ended his 2010 season, he played in three games this season. He missed the last four games with a hamstring injury and did not register a sack this season. "He just didn't come around," Tucker said. "We felt like at this point it was the best thing to do." The Jaguars have placed 25 players on injured reserve this season.
*Jaguars defensive end Matt Roth was ruled out of Sunday's game with a concussion. He has missed the last two games after sustaining a concussion against Cleveland November 20. Roth said he is progressing, and said he expects to play against Atlanta Thursday. "I'm doing good," he said. "I'm getting back in the swing of things and I've had no relapse. By next week, I'll be mad if I can't play." Leger Douzable is expected to start a third consecutive game in Roth's place.
*Reserve rookie cornerback T.J. Heath was ruled out after sustaining a shoulder injury Thursday in practice.
*Tight end Marcedes Lewis (ankle) is listed as probable, as is right tackle Guy Whimper (thigh), wide receiver Cecil Shorts (hamstring), defensive tackle Tyson Alualu (not injury related), fullback Greg Jones (not injury related) and running back Maurice Jones-Drew (not injury related).
*Tucker said the week of preparation this week for Sunday, "Went great. The guys did a really good job with that. The focus was very good and the mindset was upbeat and positive. The work on the field was very focused."