JACKSONVILLE – Josh Lambo knows NFL reality.

There are expectations, and Lambo realizes there will be some when he debuts as the Jaguars' kicker Sunday.

"There's always a little bit of pressure in the NFL, because it's a performance-driven job," Lambo said Wednesday as the Jaguars (3-3) prepared to play the Indianapolis Colts (2-4) at Lucas Oil Stadium in Indianapolis, Indiana, Sunday at 1 p.m. "If you don't perform well, you're out."

That was the reality of the Jaguars' kicker position this week, with former kicker Jason Myers being released Tuesday the same day the team signed Lambo. Myers converted 11 of 15 field goals with three misses from more than 50 yards and two missed extra points in the Jaguars' first six games.

Lambo, who played for the San Diego Chargers the past two seasons, worked out for the Jaguars earlier this season. He flew to Jacksonville Monday, a day after Myers' two missed 54-yard field-goal attempts against the Rams Sunday, and signed the following day.

"Whatever pressure you have, you put it on yourself," said Lambo, who made 52 of 64 field goals and 70 of 78 extra points with the Chargers. "You can relieve yourself by doing Monday through Saturday the right way. Getting released by the Chargers made me reevaluate all of that stuff, and it's definitely going to make me a better player."

The Chargers released Lambo on September 2 this season, the day NFL teams had to cut their preseason roster to the regular-season limit of 53.

Notes and observations from Wednesday around EverBank Field:

*The Jaguars rank ninth in the NFL in total defense, and also rank third against the pass while leading the NFL in sacks (23) and takeaways (16). But the Jaguars also rank 31st against the run, having allowed more than 192 yards per game rushing in three losses. "When you think of elite defenses, it's not only teams that are good with sacks," linebacker Paul Posluszny said. "You have to be able to stop the run. You can't have a team come in and run the ball well. For us to truly be elite, that's being good in all phases. That's being able to stop the run, get after the quarterback, play well on the back end. We have work to do." Posluszny and other players said the primary issues remain defenders getting out of gaps and being undisciplined, which have led to the defense allowing too many cutback runs. "We just have to continue to play," linebacker Telvin Smith said. "I'm not going to say, 'Be more physical,' because we're flying around out there. You've got to stop the run to beat teams. If they can run the ball, control the clock and manage their game plan, it's going to go in their favor. If we want to continue to say we're a great defense, we've got to stop that." …

*A major Jaguars topic this week has been preventing teams from stacking the line against running back Leonard Fournette and the NFL's top-ranked running offense The Rams went to an extreme in a 27-17 victory over the Jaguars Sunday, playing much of the game with five or six linemen and two or three linebackers. That was very close to a goal-line defense in situations that usually would have called for base defenses – or perhaps base defenses with a safety close to the line against the run. "We're definitely going to see different things than what we were going to have prepared for during the week," quarterback Blake Bortles said, adding that coaches are trying to present a variety of looks in practice. "Whether it's the right look or not, we'll at least adjust to it and figure different things out," Bortles said. "For as many times as we run the ball, and I think how well we've been running it, guys are going to do different things to make sure they can try and stop the run. We're going to have to figure out and adjust to it on the fly. I wouldn't be surprised at this point to see anything."

*Bortles was asked if he ever had seen a team play a goal-line defense in the normal course of a game. "That was definitely a first," he said. "We'll get some practice against goal-line defense in the middle of the field and be ready for it next time." Bortles added that the defense creates opportunities in the passing game. "You get a good match-up outside," he said. "That's something we'll have to be aware of, take shots and hit them when we take them." …

*Fournette (ankle) was among five Jaguars players not practicing Wednesday, with the others being wide receiver Marqise Lee (knee), cornerback A.J. Bouye (hamstring), safety Tashaun Gipson (neck) and center Brandon Linder (illness); Head Coach Doug Marrone said early Wednesday afternoon that the team must "wait and see" on Fournette's status Sunday, and that Linder is improving from the illness that kept him out of the last two games. Bortles (right wrist) was listed on the injury report as practicing full, and cornerback Jalen Ramsey (calf) and tight end Marcedes Lewis (shoulder) practiced limited. …