Ion Tiriac
Ion Tiriac, who was once among the greatest tennis players, hails from Romania. He ended up victorious during the 1970 French Open and even reached No. 8 in the world rankings when he was active in the ‘60s and ‘70s. Not unlike the other athletes here, his post-retirement career was highly lucrative. His success as a tennis player barely holds a candle to his various successful business endeavors. He was able to reach billionaire status by making investments in petroleum, real estate, and auto dealerships.

Ion Tiriac
Oscar de la Hoya
Oscar “The Golden Boy” De La Hoya was a straight-up killer in the field of boxing. Although there is nothing to laugh about his career record of 39-6, we daresay that his six world championships in different weight divisions are more impressive. He last went into the ring over a decade ago. Despite this, he continues to be involved in the field by working as a promoter with his firm Golden Boy Promotions. There is no doubt that ODLH continues to bring in a fortune as the majority shareholder of what might just be the most successful promotion company in boxing.

Oscar de la Hoya