I just want to add...I looked up the plural... PASTORS also, and I found these...

Jeremiah 2:8, 3:15, 10:21, 12:10, 22:22, 23:1, 23:2 and Eph 4:11 (of course I even quoted that one just a bit ago!)

I did not see any Scripture reference that was converting Deacons into Pastors as the same or something of that nature here in the King James Version.

Actually, most of the verses pertaining to Pastors, sad to say, in Jeremiah are negative, not all but most.