Who Is Joe Buck? 'Jeopardy's!' Next Guest Host Revealed 04/17/21 AT 1:06 PM Joe Buck has announced that he’ll be one of the many guest hosts on “Jeopardy!,” which will put him in the running to potentially become the full-time host. The 51-year-old is a sportscaster who’s worked with Fox Sports and has been the main voice of the NFL and the MLB since the 1996 World Series. His father is Jack Buck, also a well-known sports broadcaster. His episodes are reported to air sometime in the summer, but it hasn’t been confirmed whether he’ll be hosting for just a week, or two weeks, according to the New York Post.