Ayub became the first Chilean wrestler in history to compete at the Summer Olympics at the 2012 Summer Olympics in London. He qualified for the men's 120 kg class, after placing second from the Pan American Qualification Tournament in Kissimmee, Florida. He received a bye through to his round of sixteen match, before losing out to Georgia's Guram Pherselidze, who was able to score four points in two straight periods, leaving Ayub without a single point.