Ken Jennings may want to start exercising his thumb in case a match-up of the greatest minds is ever assembled. There's a new contender coming for his championship crown. On Tuesday, James Holzhauer added once again to his incredible "Jeopardy!" winnings, surpassing the $1 million mark on his 14th appearance. The Las Vegas professional gambler broke the hit game show's previous one-day earnings record of $77,000 with a whopping $131,127 last week. Speaking to the Associated Press about Holzhauer, Jennings, who racked up $2.5 million in his 74 visits, admitted, "James is just a perfect 'Jeopardy!' machine."