Frontman of Godsmack and also a successful solo artist, Salvatore “Sully” Erna has a fallback skill. He’s also a professional poker player. Many rockers play cards, sure, but Erna is a real earner: he played in the 2007 World Series of Poker main event, and was placed 2nd in a preliminary event at Bellagio's 5 Diamond World Poker Classic, grabbing a $307,325 prize. Playing poker well is generally considered to be a mix of higher IQ and emotional intelligence, but as with chess players, time could soon be up – January 2017 saw an AI poker computer known as DeepStack wreak havoc on 11 pro players, winning $800,000 in the process. Erna should maybe get back to the guitars – he designed his own Gibson Les Paul. And the drums as well. He can play both.