"Jeopardy!" champ Brayden Smith has died at the age of 24, his mother confirmed."We are heartbroken to share that our dear Brayden Smith recently passed away unexpectedly," she wrote online. "We are so grateful that Brayden was able to live out his dream on @jeopardy." According to his online obituary, Smith died a week ago on Feb. 5. No cause of death was mentioned.