A.J. Smith: Vincent Jackson is “highly unlikely” to get the tag

Well, one prediction from our newly updated franchise tag primer should prove correct. Chargers G.M. A.J. Smith said on XERPS radio in San Diego (via NFL.com) that Vincent Jackson is likely to hit the free agent market if the Chargers can’t get him to sign a long-term deal before March 13. “Right now, I’m not real…