Or any single father in 49 states, regardless of their age, or even if they are living together. see link
If you mean that the father hit the mother, and that is the reason she left the father, then no, that is not grounds to obtain custody. The courts usually award custody to the mother, unless she is unable to care for the child, or if she has been proven an unfit parent. Hitting a woman, especially the mother of your child, may actually go against you in a custody suit against the mother, and the mother had every right to take the child and leave if the father of her child hit her. The courts may also look at it as if the father hits the mother, then he may hit the child, too.
The mother. The father have to petition the court for visitation right and custody.
You have the visitation rights that were established in the divorce, and you have no custody rights.
First off, a single mother, regardless of status, has sole custody. The father has no assumed parental right, so he will be starting from scratch. Can he get custody? There's no more guarantee in this than for any single father. see link
The mother. The father have to petition the court for custody or visitation right.
O9nly if he has primary custody, or family is intact.
Boyfriend or husband (unless he is the biological father) has no legal right to the child at all. The mother can try to go for full custody though.
If you live in the US... The father's parents have no rights to custody at all. The father has the right to petition for custody, but he won't be given sole custody unless he can prove the mother unfit. He might, however, be given joint custody.
The mother already has sole custody. The father has not rights. see link
he has the right to fight for custody of the child involved but in the end depending on the situation the mother would be granted soul custody unless the mother is less fit than the father to raise the child
He has the right to petition the courts for visitation.
Sure. The father looses his right to have a vote in any kid related decisions, but can still have visitation and such.