WCW Heavyweight Champion The Rock 
How’s this for a caption?
At WWF SummerSlam 2001, The Rock defeated the 5x WCW Champion Booker T for the WCW Championship. He then lost the title to Chris Jericho at WWF No Mercy a few months later.
Correct me if I’m wrong here, and I probably am, but does anyone else feel like the WCW Championship should have NEVER been defended on WWF television? The Invasion angle was awful. The best thing that came of it was that Chris Jericho became the WCW Heavyweight Champion, a title which he would have never been given the chance to win in WCW.