This change will happen for season 4, the rest of the episodes for season 3 will still be under Mazzara.
I am bad about putting episode names to the actual episodes.
He did write or help write Save the Last One, Pretty Much Dead Already, and 18 miles out from the second season. And Hounded and the Upcoming Sorrowful Life.
I did look up the episodes, by title I recall liking them more or less.
I know he did the last Ghost Rider movie.
I would be also curious why Mazzara is no longer show runner.