Who is Yasir Al-Rumayyan, the 'mystery man' sitting beside Trump at UFC fight?

The man, termed as the 'mystery man' in some of the videos doing rounds on social media, was Yasir Al-Rumayyan, the head of Saudi Arabia's Public Investment Fund, Fox News reported. Al-Rumayyan also chairs Saudi Aramco and the English Premier's Newcastle United Football Club. The Washington Post reported that Trump met key Saydi figures in recent days. He played a round of golf with PGA Tour commissioner Jay Monahan on Friday.