The improvement that Randall Cobb showed from his rookie year in 2011 to last season was more than the Green Bay Packers could have possibly hoped for.

Cobb finished sixth on the team in receptions and yards in his first NFL season with 25 catches and 375 receiving yards. The Year 1 to Year 2 jump that coach Mike McCarthy always preaches was proven to be true for Cobb, who led the Packers in receptions (80) and yards (954) in his second season in Green Bay.

Even with that drastic increase in production, that's not the best that Cobb can do. At least he doesn't think so.

"I still don't think I've peaked yet," Cobb told this week. "I'm only 22 years old, I still have a lot of room to grow. I'll just continue to get better year in and year out, week in and week out, and just continue to rise up."

Cobb, the Packers' second-round pick in 2011, had a lot more opportunities last season to display his blend of speed and precise route-running. As a rookie, Cobb was only on the field for 309 snaps (28.6 percent). Last season, Cobb's 733 snaps (61.7 percent) were the second-most among Green Bay's group of wide receivers.

"I think (the personal improvement was) mostly opportunities and me taking hold of those opportunities," Cobb said. "I was just trying to get into the rotation last year. When I did get into the rotation, I got my opportunities and I tried to make the most of them. Moving forward, whenever I get those opportunities, I have to hold them down."

Some of Cobb's additional playing time in 2012 was a result of Greg Jennings missing eight games and Jordy Nelson sitting out four games, as injuries plagued both of them. Cobb capitalized on that, but he won't need teammates to get hurt in order to get those chances again next season.

Jennings signed with the Minnesota Vikings in the offseason, while the Packers' all-time leading receiver, Donald Driver, retired. That leaves Cobb to lead a diminished wide-receiver group that also features Nelson and James Jones.

"I'm not going to approach it any different," Cobb said. "I'm very hard on myself. I've always been my biggest critic. I expect a lot of things out of myself. I'm just going to continue to work hard, continue to do what I do and, as far as my offseason preparation and my in-season preparation, continue that routine.

"I know I'll have more opportunities this year, obviously. Me, Jordy and James, we're all looking forward to this opportunity, knowing that it's us three. We really do miss Greg and Donald, and we know what they meant to this organization and to this team for so many years, but we have to take control of what's in front of us and face it head up."