Hmmm. You would ask that :-). I have been listening to a long series of podcasts on bishops in the church but I can’t remember the detail. I’ll try to find out and get back to you.
I don’t believe the East ever had married bishops. Priests, yes, Bishops, no. :)
Clerical celibacy wasn’t standardized in the west until the Council of Elvira in the early 4th century. Prior to that, East and West would have had the same understanding regarding married priests and unmarried bishops.