Plenty of big-name free agents remain available

It's July 4. The annual celebration of American independence. With training camps opening in a few weeks, there are plenty of players who would be interested in shedding their own independence and joining a team.In recent weeks, much of the focus has fallen upon running back Dalvin Cook and receiver DeAndre Hopkins. But there are plenty of other players with instantly-recognizable names who remain available to be signed, by any team at any time.Several quarterbacks remain unattached, including