During his 32-game streak, he won $2,462,216 and broke several of the game show's records, including most money won in a single game with $131,127, according to the show's James Holzhauer tracker. With the donation he wrote: "For Alex Trebek and all the other survivors".
In May, Trebek revealed that he was responding well to treatment and is in "near remission" - something that, in the past, has often been unheard of when it came to pancreatic cancer.
While he couldn't attend the upcoming walk, the donation website shows, Holzhauer gave $1,109.14.
"I sent him an email saying that it's been interesting to see paths cross in my life and I feel like it's time for our paths to cross", Ann Zediker, who lives in the same suburb as Holzhauer, told ABC station WLS in Chicago.
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While the top three picks appear locked in - Williamson to the Pelicans, followed by Ja Morant (Memphis) and R.J. Saric, 25, was the 12th overall pick in 2014, and averaged 10.5 points and 5.5 rebounds last season.
The walk, which will take place in IL on July 14, raises money for pancreatic cancer research.
Following his final episode airing earlier this month, the TODAY show reported Holzhauer has already donated some of his winnings to multiple children's charities in Las Vegas, where the professional gambler and his family live. 'That was very sweet of her'.
Which represents his daughter Natasha's birthday.
"My gut told me it was the right thing to do", she said. "I shared with him how I lost my father from pancreatic cancer".
"There was no expectation on my end", Zediker told CNN.
He said his chemotherapy had been effective, shrinking some of his tumors "by more than 50%".