J.B.
A couple of questions before I can answer.
Did he try to see the child as soon as he found out about him? Does he pay child support?
If he has made every effort to see his son since he found out about him and he is paying child support, then he should be a part of his life. If he neglected to try to see the child when he found out about him and if he doesn't pay child support, he has no right to see him if the mom doesn't want him to. He might have legal rights, but he should respect her choice in the matter. It could cause more problems with the child than it is worth. The boy thinks he has a dad in his life, why confuse him if it has been this way his whole life.
My son's father moved away shortly after we split up, when son was a weak shy of 3 years old. He called us about 14 months later and we haven't heard from him since, until a week ago. I would rather not have him in and out of my son's life. I am doing a good job on my own. I don't get any child support. As far as I am concerned he has no rights to my son. My son is better off feeling abandoned than the mess of a life my ex has to offer. He was abusive when we were together, so that shades my opinion. I hope this helps.