Roger Alan Craig (born 1977) is an American game show contestant and computer scientist. He held the record for highest single-day winnings on the quiz show Jeopardy! from September 14, 2010 (surpassing Ken Jennings) to April 9, 2019 (when James Holzhauer surpassed him). In 2011, Craig returned to win the Jeopardy! Tournament of Champions. In 2014, he competed in the Battle of the Decades tournament, finishing third overall behind Brad Rutter and Ken Jennings. Early life and career Craig, who was 33 years old at the time of his initial Jeopardy! appearance in 2010, is a native of Ferndale, Pennsylvania. He grew up there and later in Virginia, where he graduated from Annandale High School in 1995. Craig holds a first degree in biology and biochemistry from Virginia Tech, and a master's degree and Ph.D. in computer science from the University of Delaware. He was working on his doctorate at the time of his first appearance on Jeopardy!, and completed the degree later in 2010. In his scholarly career, Craig has published eight papers in the field of bioinformatics, specifically on topics of combinatorial protein synthesis and protein-protein prediction. As of November 2011, Craig was living in Newark, Delaware, and working as a computer scientist. He is the founder of Cotinga, a company which performs data analyses and creates learning applications for smartphones. Craig was a guest on KFC Radio of Barstool Sports on August 23, 2012. Jeopardy! Preparation Craig prepared for Jeopardy! by studying the online archive of past questions maintained on the J! Archive website. Using data-mining and text-clustering, he identified the topics most likely to occur in game questions, then used the spaced repetition program Anki for memorization and tested himself using his own program. Craig played quiz bowl as a student at both Virginia Tech and the University of Delaware. Before his Jeopardy appearances, he played numerous Jeopardy scrimmage matches against his friends with quiz bowl experience. Craig believes his attendance at the two universities helped the most in his success:Let's face it, for Jeopardy!, the name of the game is breadth not depth. I think the main reason both universities helped so much is that they cover just about all spheres of learning in extraordinary depth. Appearances Original run Craig set his record of $77,000 on the second day of the 2010–2011 Jeopardy! season on the episode airing September 14, 2010. In his record-setting appearance,