I am going through the same thing with my rooster. He is so fiesty in the mornings and comes out of the coop ready to attack. I make him wait in the coop, seeing me move around in the yard and I put the food out before I let him out. I also placed sticks strategically around the yard, so he can't catch me without the stick. Just in case I need to back him off. Even the hens don't want to be near him in the morning. lol
Do you hold him? I had to net mine (too fast to catch) then hold him. I also had to hit him with the stick and stand tall. Just enough to get his attention, not enough to hurt him. I earned some respect and he has left me alone for like a week, then he tried again, but he didn't get me, I had to kick over a small table and scare him.
I think he watches me and waits for me to be occupied, then he moves in, ninga like and pecks me. The forum is very cull the rooster, but I am trying to rehabiliatate him by spending some time with just him everyday. Although if he ends up hurting me or my family, the decision will have to be made. Good luck!!