What‘s Going on With David DeCastro?

The Pittsburgh Steelers brought in a proven free agent guard last week. Why? If Kevin Dotson is the future, that must mean something is up with David DeCastro, right? Zach Banner always says the right thing. When Carl Nassib opened up about being an active gay football player, Banner was right there with his support and a proud representation of the Steelers. Who's starting at nickelback? What we've seen from the group of misfits trying to replace Mike Hilton and how it likely will work out for the defense this season.