Hi rocklolo, not sure what to advise on the digging...we have a concrete yard!
As far as biting goes, as soon as puppy digs his teeth in, make a loud yelping noise (as if you are mortally wounded-really ham it up!) and stop interacting with him. Start the game or cuddle again when he settles down, and repeat the process each time he bites. He will soon learn that such biting is unacceptable.
I am told that normally his littermates would help him in this, so you have to be a littermate substitute, teaching him, through play, that he can't bite! 14 weeks is just about the time he will be testing his boundaries, so make sure you are firm but fair!
Please don't ever hit him-hands must give, not take away or hurt (and please don't think I am assuming you would hit him!)