Regular game[]
She is one of three members of her family to have played on Jeopardy!, all between 2004 and 2008, and the only winner of the three. Her husband Jeff Hoppes was defeated by Ken Jennings in Jennings's 70th game as champion. Her sister Arianna was defeated in her initial Jeopardy! appearance, in part due to questionable calls that prompted Standards and Practices to bring her back for a second appearance; in her second appearance, Arianna was defeated by Aaron Schroeder, who later faced Larissa in the 2009 Jeopardy! Tournament of Champions finals.
Including tournament winnings, Kelly has won more money on Jeopardy!, $660,930, than any other female contestant and is second to Julia Collins in Jeopardy! winnings outside tournament play. During her regular run on Jeopardy!, Kelly won a total of $222,597 over six games and $1,000 3rd place consolation prize in her seventh, with her last appearance airing May 28, 2008. Excluding tournament winnings, Kelly is the second-highest winning female contestant and ranks fifth all-time in Jeopardy! earnings.
While she was champion, Kelly broke Ken Jennings's record for most money won in a contestant's first five days by winning $179,797; this record was one of two Roger Craig broke during his reign as champion, as he won $195,801 in his first five games (Craig also topped Jennings's single-game record of $75,000). Kelly is also the fourth-highest winning female contestant in any single game in Jeopardy!'s history. Kelly's $45,200 performance narrowly trails Maria Wenglinsky, who won $46,600 on November 1, 2005, and Emma Boettcher and MacKenzie Jones who both won $46,801 on June 3, 2019, and February 19, 2020, and Amy Schneider who won $71,400 on January 20, 2022.
| Game No. | Air Date | Final score | Cumulative Winnings | Notes |
|---|---|---|---|---|
| 1 | May 20, 2008 | $45,200 | $45,200 | Larissa's first runaway game. |
| 2 | May 21, 2008 | $35,400 | $80,600 | Larissa's second runaway game. |
| 2 | May 22, 2008 | $28,000 | $108,600 | |
| 4 | May 23, 2008 | $37,597 | $146,197 | Larissa's first win from second place. |
| 5 | May 26, 2008 | $29,000 | $179,797 | Larissa's second win from second place. |
| 6 | May 27, 2008 | $42,800 | $222,597 | |
| 7 | May 28, 2010 | $1,800 | $223,597 | Pat Roche ends her streak with a runaway. |
Tournament Of Champions[]
In the second quarterfinal game, she faced 5-day champion Matt Kohlstedt and 4-day champion Tom Morris. She gave 26 correct responses (including one DD) and only one wrong response. She was the only correct respondent and moved on to the semifinals.
In the second semifinal game, she faced 5-day champion Cora Peck and 4-day champion Dave Simpson. She gave 28 correct responses (including one DD) and three wrong responses (including one DD). Once again, she was the only player correct in Final and advanced to the finals.
In the finals, she faced 5-day champion Aaron Schroeder and 9-day champion Dan Pawson. In game one, she gave eighteen correct responses (including one DD) and three wrong responses. She and Dan got Final correct. In game two, she gave 26 correct responses (including two DDs) and only one wrong response. Her opponents got Final correct. She took home $100,000 for first runner-up.
Battle of the Decades[]
She played in the Battle of the Decades 200s in game 3. She faced Season 22 8-day champion and 2006 Tournament of Champions quarterfinalist Tom Kavanaugh and Season 20 4-day champion, 2004 Tournament of Champions winner (semifinalist by wildcard) and 2005 Ultimate Tournament of Champions Round 1 player Russ Schumacher. She gave 23 correct responses (including 2 DDs) and one wrong response. Final Jeopardy was a Triple Stumper. She and Tom took home $5,000.
All-Star Games[]
She played in Team Brad with Season 17 5-day champion, 2001 Tournament of Champions winner, 2002 Million Dollar Masters tournament winner, 2005 Ultimate Tournament of Champions Nifty Nine member (he had a bye into Round 2), Elite Eighteen member, Sweet Six member, and winner, 2011 IBM Challenge second runner-up and 2014 Battle of the Decades winner Brad Rutter and Season 21/22 19-day champion and 2006 Tournament of Champions semifinalist David Madden. In match one game one, Team Brad gave 27 correct responses (including two DDs) and only one wrong response. Her team was the only player correct. In match one game two, Team Brad gave twelve correct responses and five wrong responses. Her team and Team Colby got Final correct. Her team became an automatic finalist.
In the finals game one, they gave 26 correct responses (including two DDs) and no wrong responses. All teams got Final correct. In the finals game two, they gave 23 correct responses (including all DDs) and no wrong responses. All teams got Final correct and her team won $1,000,000 splitting it between her team members.
Jeopardy! Invitational Tournament[]
In the second quarterfinal game, she faced 2013 Teen Tournament winner (finalist by rule as having the highest nonwinning semifinal score after the second semifinal game ended without a winner) and 2019 All-Star Games member of wildcard-match second-place Team Austin Leonard Cooper and Season 35/36 19-day champion and 2021 Tournament of Champions wildcard semifinalist Jason Zuffranieri. She gave 25 correct responses (including one DD) and only one wrong response. She and Leonard got Final correct. She advanced to the semifinals.
In the second semifinal game, she faced Season 38 5-day champion, 2022 Tournament of Champions first runner-up and 2023 Jeopardy Masters fourth place player Andrew He and Season 35 5-day champion and 2021 Tournament of Champions winner Sam Kavanaugh. She gave 21 correct responses and only one wrong response (the DD). She and Sam congratulated Andrew who advanced to the finals.