NFL.com identifies the No. 1 challenge for the 49ers

Signing wide receiver Brandon Aiyuk to a contract extension has been a significant challenge for the San Francisco 49ers this offseason. It's undoubtedly been the most discussed storyline, especially with training camp set to kick off this week. However, according to NFL.com's Eric Edholm, it's not the No. 1 challenge facing the team.

Edholm believes the 49ers' biggest challenge is making the most of this offseason's defensive line makeover.

"That's the position group that saw the most overhaul this offseason, with Arik Armstead, Chase Young, Javon Kinlaw, Clelin Ferrell and Randy Gregory all gone from last year's club," Edholm wrote. "Leonard Floyd, Maliek Collins, Jordan Elliott and Yetur Gross-Matos headline the offseason additions in this area. Pro Bowler Nick Bosa still anchors the front, and Floyd has been a steady pressure source in recent years."

The 49ers hope their offseason moves will create a formidable force in the trenches, aiming to rebound from a gut-wrenching Super Bowl defeat in February and capitalize on a championship-caliber roster looking to achieve Super Bowl glory.

However, challenges remain. The roster isn't the only thing that has undergone significant changes this offseason. For the second consecutive season, the 49ers have new leadership on the defensive side of the ball, which will be a transition in itself.

Edholm added, "But there's pressure on new defensive coordinator Nick Sorensen, who has risen fast through the ranks over the past couple years, to keep this unit among the better ones in the NFL, perhaps with some help from new assistant head coach/defense Brandon Staley."

As the 49ers prepare for the new season, they will focus on ensuring that the revamped defensive line lives up to its potential and helps the team push for a championship.