Ravens general manager Eric DeCosta concedes the team lacks the goods at center on its current roster, and he’s been playing coy about his solution to the problem. Lately, he’s been noodling – through the team ‘s in-house media – about a trade. In conversations with numerous current and former NFL decision makers, it seems highly dubious that he’s going to land a proven, plug-and-play quality center at this point in the offseason via that sort of transaction. Spend a few hours studying every depth chart in the NFL – hand up, I did – and talking to execs about recent trade conversations, and there aren’t many likely outcomes. No team truly loves its offensive line situation – which helps explain the run on them in the draft as we predicted along with former GM Marty Hurney on “The Daily Flock” and which the Ravens sat out. So other GMS aren’t keen to give away starters or quality depth in exchange for draft picks to be utilized a year from now.…