In my experience I found that the pitcher will usually tag out the player running for home on a bunt. Once in awhile if your lucky the pitcher will throw to 1st instead. Just make sure you don't have two outs already, or when the pitcher takes out your first base runner your inning is up causing you not to get a score. Also, make sure you quickly tap the LB to force your 3rd base runner to run home. If there is no one on 2nd to force him to run home he will just stay there.