5 Crossover stars that helped legitimize WWE in the mainstream 

#3 Floyd Mayweather

Floyd Mayweather was a huge draw for WWE at WrestleMania 23.

It's no secret that WWE goes all out when they do crossovers matches with other sporting personalitites and the storyline between The Big Show and Floyd Mayweather was definitely no exception.

WWE even put promoted that Mayweather's undefeated streak was on the line leading up to their eventual match at WrestleMania 24, which definitely helped raise the stakes.

Think about it! This man was a boxing champion. A man that hadn't been beaten by knockout in his entire career and WWE was going to capitalize on that anyway they could. In fact, maybe that's why they made Big Show his opponent! Not only did it present a challenge, it really left fans wondering what would happen next.

In the end, Mayweather was able to get his hands on some brass knuckles and knocked out Big Show for the win, but the match was nothing short of amazing. It was also one of the most unique crossovers that WWE had ever attempted and it really helped bring in the mainstream attention the company needed for the event.