The guy who played his Father did look remarkably like him. They had the exact same nose.
In just a few episodes at the very beginning he had a different and very much more unpleasant guy portraying Rockford’s Father.
It was the trailer that had the other guy playing his father.
Rocky was a key role to the Rockford files success.
I have all 6 seasons on DVD, watch them regularly, they remind me of a much simpler time.