By Chris Rosvoglou Calais Campbell isn’t ready to retire just yet. Moments ago, ESPN’s Adam Schefter announced that Campbell is returning to the Baltimore Ravens on a two-year deal. “Free-agent DE Calais Campbell, a six-time Pro-Bowl selection, is returning to Baltimore on a two-year deal, per source. The 35-year-old Campbell has spent the past two seasons in Baltimore and now is expected to finish his NFL career there,” Schefter tweeted on Saturday morning. NFL insider Josina Anderson is reporting that Campbell’s contract with the Ravens includes $6 million guaranteed at signing. During the 2…