With the news of Justin Smith retiring Monday, Armstead is in the mix for starting at left defensive end this season, Matt Barrows of the Sacramento Bee reports.

With the news of Justin Smith retiring Monday, Armstead is in the mix for starting at left defensive end this season, Matt Barrows of the Sacramento Bee reports.

Analysis:

The 49ers used their first-round pick in this year's draft on the physical lineman in anticipation of Smith retiring. While Armstead is considered "raw" at this point, he could earn a starting spot in training camp if he can outplay Quinton Dial and Tony Jerod-Eddie.