At 5'8 - 5'9, people who try to bring people down about their heights are stupid as they are not too far from the average. Of course, he wouldn't do this surgery, he is fearsome, rich and famous, and his entire life is based on athletism. It would be stupid of him to do this surgery now and maybe he would consider it later in life if at all. He could get most likely all kinds of women, people respect him as he is at the top of his sport, and even the tallest dudes would think twice before entering in a fight with him.