ENGLEWOOD, Colo. -- Used to digging in and standing up to what’s in front of them, the Denver Broncos' beleaguered offensive line has now dug in to fend off a wave of critiques that has gotten bigger with each passing week.

While the group admits there’s work to be done, they aren’t necessarily putting a lot of stock in what’s being said outside the walls of the team’s complex.

“Definitely, it’s a work in progress," guard Manny Ramirez said. “I understand a lot of people are talking outside of here, but we can’t allow ourselves to worry about that type of stuff. We’ve just got to make sure we stick together and continue to put our heads down and continue to grind and be able to with whatever we’re given."

In their recent three-game stretch, the Broncos have gone 1-2 and quarterback Peyton Manning has thrown two interceptions in each of the last three games. And while Manning has been able to avoid sacks much of the time, the Patriots, Raiders and Rams were able to get pressure on Manning and affect his ability to step up in the pocket and into his throws.

The Broncos’ sack total is still the lowest in the league for quarterbacks who have started every game, but the increased pressure, especially in the middle of the formation, has resulted in batted passes, interceptions and some choppiness in the offense. The Broncos have also had 37 rushing attempts this season for either no gain or negative yardage.

“If we go, the team goes, we definitely need to improve," left tackle Ryan Clady said. “We had a bad week (against the Rams). I think we’ll get better and we’ll get it back on track."

The Broncos have made four changes in the offensive line in recent weeks, with Paul Cornick replacing Chris Clark at right tackle before being replaced two games ago. Louis Vasquez was then moved to right tackle, Ramirez to right guard, and Will Montgomery was put into the lineup at center.

Those three have played those spots for the last two games. Vasquez has also dealt with some back/neck issues while Clady has been slowed by a groin injury, impacting his ability to move in recent weeks. Clady said his surgically repaired foot -- he spent most of the 2013 season on injured reserve -- felt better this week than it has all season.

In search of a successful organization, the Broncos worked out Richie Incognito, a key figure in the Miami Dolphins’ bullying scandal.

“We’ve just got to continue working hard at it," guard Orlando Franklin said. “Continue trying to create chemistry, because here’s the thing, you don’t just chemistry in two weeks in the offensive line. It’s not going to be like that ... we understand we do need to get better, we understand our team is relying on us, for us to get better and we will get better."

ESPN analyst Mark Schlereth, a former Denver guard, blasted the Broncos' line play on a radio appearance in Denver this week, using words such as “horrendous" and “horrible" to describe what he had seen thus far.

Schlereth said “an F would be kind."

The Broncos linemen, who have seen Schlereth at the team’s complex from time to time, said they were trying to tune it all out.

“I care what my teammates think, each and every one of my teammates think," Franklin said. “...We’re going to care what our coaches think, what everybody in this organization thinks, but outside noise, we’re not going to be listening to that. If the Broncos were 16-0 there would still be issues, people are still going to critique our performance ... It’s the NFL, it’s the life that were living, it’s the business that we’re in."