Undertaker 17-0

I have been noticing that Undertaker has been the undefeated one, ever, when it comes to Wrestlemania. However, I think he deserves it knowing he has been 'serving' WWE for more than a decade, more than it. But somehow, I sometimes think that his opponent could have defeated him IF IT WAS really really a wrestling competition, without any storyline involved. I must admit that WWE has been tied up by its storyline, and most of them are enjoyable. I mean some of them are not.