Getty SI on Lions' Emmett Matasovkey named Jerry Jacobs an external cornerback option to replace Terrion Arnold. Fortunately, the Detroit Lions received a great update on injured cornerback Terrion Arnold on Tuesday. ESPN’s Adam Schefter reported a second opinion indicated Arnold’s shoulder injury is not season-ending. Furthermore, Arnold could only need about a month to recover. That prognosis means the Lions might be less inclined to add another cornerback. However, if Arnold lands on injured