Bryan Knight is slated to replace Colvin and could provide an upgrade in pass coverage. Knight is a better athlete than Colvin, which should help stay with opposing tight ends and running backs.
However, Colvin possesses a knack for getting to the quarterback. He led the Bears the past two years with 10.5 sacks each season. Most of his sacks came when he lined up at defense end in the nickel defense.
At this point it would be unrealistic to expect that kind of production from Knight, who is entering his second year in the league after being selected by the Bears in the fifth-round of the 2002 draft.
"That would be a lot of pressure on Bryan, because that (rushing the passer) was Rosey's strength," Jauron. "Rosey had a knack at pass rush. As an athlete Bryan is definitely a faster. But, Rosey had the feel for pass rush.
Knight's athleticism helped him take down the quarterback in a preseason game as a rookie. He brought down Rams' quarterbacks four times, but talent alone will not make someone a consistent pass rusher.
"It may turn out that Bryan can do that because he'll be quicker at the edge," Jauron said. "But, there's a lot more than just speed involved in that part of the game. We'll have to get it from somewhere else and he'll have an opportunity to show that he can do it."
Being that Knight has limited experience lining up at defensive in the NFL the Bears will also look to first-round pick Michael Haynes to pick up the slack.
"Michael's going to have an opportunity to play. We're counting on it to a degree," Jauron said. "How early depends on how quickly he comes along."
Haynes had 15-sacks his senior season and forced seven fumbles in route to being named the 2002 Big Ten Defensive Player-of-the-Year as a senior. The Bears see Haynes as a starter down the line, but plan on bringing him along slowly. He will primarily be used along with Knight on the edge in pass rush situations.
"I'm definitely happy with the situation I'm in because I realize it's a big jump from college to the pros," Haynes said. "I realize it's going to take some adjusting. I'm just hoping my adjustment will be as short as possible."
The pace that Knight and Haynes adjust to their roles will go a long way towards answering one of the team's biggest question marks.
Who will provide pressure on the quarterback?