Funny how the reporter says he is a good veteran add, to a "relatively unproven" backfield, but Murray has played in 135 games and Harris has played in 38. That doesn't seem too inexperienced to me. (Johnson has played in 62) I think that is a "proven backfield, even without Cooks stats.
Plus, Johnson has 7 career TD's, compared to 60 for Murray (including post season) and 20 for Harris.
"Johnson will provide organizational depth for Buffalo behind a relatively unproven backfield consisting of James Cook, Damien Harris and Latavius Murray."