The Kansas City Chiefs are releasing wide receiver Marquez Valdes-Scantling, a person familiar with the decision told The Associated Press on Wednesday, giving the Super Bowl champions some much-needed salary cap flexibility. The person spoke to the AP on condition of anonymity because the Chiefs had not announced the move, which would save $12 million that they could use to shore up their offense or help keep defensive stars Chris Jones and L'Jarius Sneed next season. The Chiefs gave Valdes-Scantling a three-year, $30 million deal two years ago in the hopes that Patrick Mahomes could turn the former Packers wide receiver into a viable deep threat.