Wayne Gretzky is one of the best hockey players ever. He is so good, in fact, that he is often used as an example in other sports. For example, someone might say “He is the Wayne Gretzky of football”, to relate them to how good Wayne Gretzky was. Gretzky Immigrated to the united states in his twenties, but went pro when he was only 16, after only 2 amateur seasons, earning him the title of one of the best and most impressive hockey players ever. Hakeem Olajuwon was born in Lagos, Nigeria in 1963. Though he stared playing basketball at 15, he still is considered the second best player in the NBA. Hakeem moved to America when he went pro, at the age of 18. At 7 feet, Hakeem is also one of the tallest players in the NBA.