or the moment, the old guard is gone. Unless something changes in the next four weeks, life without Ryan Pickett and Johnny Jolly may become a reality for the Green Bay Packers' defensive line.

That would leave the Packers without two-thirds of their starting base defensive line from a year ago and without 18 years of NFL experience. The nine players listed as strictly defensive linemen on the Packers' offseason roster combine for only 17 years of experience.

New leaders must emerge. Third-year pro Mike Daniels has his hand raised, and B.J. Raji re-signed with the Packers in March because he felt something special brewing.

But how do you replace two of the locker room's most respected veterans who combined for 255 regular-season games played? That's life in the NFL.

"It's just the natural evolution of the position. You lose guys all the time," Packers defensive line coach Mike Trgovac said. "Everybody at this point has new guys in there and they have to make the most of their opportunities. ... We kind of the last couple years had a lot of the same guys, but this is the evolution of the league and the evolution of the positions where somebody leaves, somebody has to step up."

Packers coach Mike McCarthy hasn't shut the door on bringing back Pickett or Jolly, but for now the room underwent a metamorphosis this offseason. It's younger with an average age of 24.1 years and no one older than 28. A bit lighter, too.