Don't get on his leave with your face then it will not get bit. When you get on his leave he thinks it's OK. Puppies play bite and some are rougher than others. When he gets too rough stop the playing. When he grabs your clothes, grab the back of his neck as others have suggested. He will eventually grow out of it. We had one that loved to bite all the time and we just kept telling her NO and putting a chew toy in her mouth and if she did not stop, we gave her a time out in her crate to rest. You will find when they start getting tired they will start to go crazy, so it's nap time.