Perhaps then you can help us sort out why, despite the percentage of sacks attributed to the Dolphins' blocking, the objective measures associated with blocking are no worse than average?
On the one hand, PFF attributes 41 of the sacks to the blocking and 17 of the sacks to Tannehill, which does statistically what I outlined in the original post, and on the other hand, the same source (PFF) has the Dolphins' offensive line measured as no worse than average in terms of the only three objective measures of play it compiles: 1) pass blocking efficiency, 2) overall pass blocking grade, and 3) the percentage of passing dropbacks in which the QB is pressured.
For measures 1) and 2) I'd have to see how they calculate the stats.
For measure 3), the answer, IMO, is obvious. Tannehill was 2nd quickest in the league at getting rid of the ball. That alone should give the OL a much better than average % of drop backs in which the QB is pressured. But, it didn't because they are horrible.