#2. The Big Show vs. Floyd Mayweather - WrestleMania 24

Floyd Mayweather is one of the most famous boxers in the world. In 2008, he was involved in a feud with WWE Superstar Big Show. After being coaxed, Mayweather jumped the barricade and attacked Big Show. By doing so, Mayweather put himself on a collision course with a man three times his size.
Initially, Mayweather was a babyface, but after fans rejected him, showed impressive range by turning heel. Mayweather then agreed to face Big Show in a No DQ match at WrestleMania 24. This match dominated the headlines heading into the PPV, but there was also a lot of pressure on the two men to entertain the fans.
Did you know a top WWE Superstar just wrestled outside the company? More details HERE
This was Mayweather's first wrestling match, but he knocked the ball out of the park. There were some questions regarding believability just because of the size difference between the two athletes, but 'Money' evened things up with a pair of brass knuckles and a steel chair. Size doesn't matter so much, when you know how to bend the rules.
This match set a high bar, as Floyd Mayweather took the match seriously and put forth maximum effort into entertaining the fans.