NFL Summer Series: Which teams have a true No. 1 tailback?

Kansas City Chiefs running back Kareem Hunt (27) slips past the tackle of Denver Broncos inside linebacker Brandon Marshall (54) to score a touchdown during the first quarter on Dec. 31, 2017 in Denver, Colorado at Sports Authority Field at Mile High Stadium. Editor’s note: One in a four-part summer series.

Is the NFL re-emphasizing the running game?

Last year, nine of the top 10 teams in rushing offenses made the playoffs, including the final four: Jacksonville (first), Philadelphia (third), Minnesota (seventh) and New England (10th).

And in the last three drafts, a tailback has been selected among the top four: Dallas’ Ezekiel Elliott (fourth in 2016), Jacksonville’s Leonard Fournette…