Matthew Barnett Jackson is an American paralegal and former contestant on the syndicated game showJeopardy! who is known for winning 13 straight games and earning $413,612, the sixth-highest total in regular play in both categories, after Ken Jennings, James Holzhauer, Julia Collins, David Madden, and Jason Zuffranieri. His 13-episode streak ended with a loss on October 14, 2015. Jackson's total winnings amount to $413,612, which places him 5th on the all-time money-winning list in regular games.
Jackson was encouraged to apply for the show by his friend Sam Spaulding, who won $50,000 after finishing second in the fall 2010 College Championship. After two unsuccessful attempts to enter the college tournament, he auditioned for the regular show in 2014 and was selected as a contestant. Jackson said that he repeated, "I am not throwin' away my shot," a line from the musical Hamilton, for inspiration while preparing for the show. He studied by reading previous champions' books on the experience, such as Ken Jennings’s Brainiac and Bob Harris's Prisoner of Trebekistan. Jackson initially drew attention for his slow smile while being introduced at the beginning of each show. After his first victory, he began using his fingers to display the number of wins in his streak. Jackson also became known for his buzzer speed and for quickly moving onto the next question after giving a correct response. In his fourth game, when Jackson said "Boom!" after correctly answering a Daily Double, fans and media quickly proclaimed the exclamation his signature catchphrase, but he never repeated it. Jackson's 13-episode streak ended with a loss on October 14, 2015. In his 14 episodes he earned $413,612. At the time his 13-win streak was the fourth highest in Jeopardy! regular-play history, trailing only Ken Jennings, Julia Collins, and David Madden. He was also fourth-highest in total regular-play earnings. In 2019 James Holzhauer had a 32-game winning streak, moving Jackson to fifth place in both consecutive games won and total regular-play earnings Jackson returned in November 2015 for the Jeopardy! Tournament of Champions. On the November 11 episode he won his quarterfinal game and moved on to the next round. On the November 18 episode he won his semifinal game to advance to the finals. In the two-day final aired on November 19 and 20, Jackson finished second, behind Alex Jacob, winning $100,000. Jackson appeared in the show's "All-Star Games", which aired from February 20 to March 5, 2019. His teammates were captain Ken Jennings and 2012 College champion Monica Thieu. The team took second place.