16. Ivo Karlovic – Tennis
There are tall tennis players, and then there is the Leaning Tower of Ivo Karlovic. At 6’11”, a Karlovic serve is enough to strike fear in the heart of the toughest opponent and lift him as high as No. 14 in ATP world rankings.
Karlovic holds the second highest recorded serve of all time (as officially recognized by the ATP) at 156 mph. Though it isn’t quite as highly touted an honor as the first serve, Karlovic is also the record holder for the fastest second serve ever at 144 mph.