How Do I Daze Someone Enough So I Can Get Him In A Submission Hold?

Me and my cousin always wrestle. We can't pin each other for some reason so we do submission matches. Every time I try to get him into a figure 4 leg lock, he resists and prevents me from doing it. So, is there a way to stop him from resisting or is there anyway to get him dizzy enough that I can perform the submission maneuver with less resistance? Thanks in advance, Seif