Good morning.

In this ESPN Insider piece, NFL Insider Mike Sando writes that in going back and evaluating grades for the San Diego Chargers' 2014 offseason, analysts stuck with a C grade.

Here’s what Matt Williamson had to say: “I was a little harsh on them with a C-minus grade. Their defensive moves worked out better than I expected. But the thing I was critical of them for was not doing nearly enough on the offensive line, and I think that came to fruition. No one expected them to have so many center injuries, but that was not all of it.”

Roger Showley of UT-San Diego takes a close look at new stadiums in Dublin, Ireland, and at Arizona State University that can serve as models for creating a more efficient new facility in San Diego if a proposal makes it through a public vote.

I talk with Steve Hartman and Mike Costa of Xtra 1360 Fox Sports radio about how many players away the Chargers are from contending for a Super Bowl in this audio link.

Jordan Beane and Ricky Henne of Chargers.com talk with ESPN’s Mike Golic about San Diego’s 2014 season in this video.

More Beane and Henne: Brian Billick of the NFL Network discusses what San Diego needs to improve in 2015 in this video.

Bill Barnwell of Grantland examines the history of who holds the title for the Best Defense Alive Championship Belt dating back to the NFL’s 1970 merger. The Seattle Seahawks are the current title holders since 2012, but it’s a nice trip down memory lane looking at some of the most dominant defenses in the history of the game.

In this ESPN Insider piece, draft guru Mel Kiper Jr. updates his top 25 Big Board. Washington defensive tackle Danny Shelton moves from No. 13 to No. 7, while Kiper elevates Florida State quarterback Jameis Winston from No. 6 to the top spot.

Elizabeth Merrill of ESPN.com profiles NFL officiating czar Dean Blandino.

Greg Gabriel of the National Football Post profiles Pittsburgh offensive tackle T.J. Clemmings.