I have been trying to potty train my 4 month old pit bull. Although he has been doing really good. Just have one problem. When my husband or I come home from work, he gets really excited and goes potty. How can I stop him from doing this.

Puppies quite often pee when they are overly excited.

Get your husband to completely ignore the dog when he comes through the door...
I know it will be hard but it is necessary.
He can give her lots of attention once she has calmed down.

Keep doing this and eventually she will stop being as excited and it will break the habit.

:)

At an age that young, he is probably needing to urinate badly by the time you two get home.
Ontop of Shaz's advice, you should probably take her outside ASAP when you get home.

Yea we do! Before I even put my purse down I take him out... thanks fior your advice.