Murray's injury history clouds Vikings' upside despite strong team and scheme fit.

Murray signed a one-year deal with the Vikings after being released by the Cardinals; he has a 67.1% completion rate and is expected to win the starting job over McCarthy; the Vikings have one of the best defenses in the league and head coach Kevin O'Connell has shown his scheme can be potent with competent quarterback play, but Murray has struggled with injuries over the last four seasons, missing 27 games in that span, raising questions about whether he can be competent enough for the Vikings to succeed.