The California Highway Patrol said the 63-year-old game show host was driving his pickup truck Friday down a rural road when he apparently fell asleep, ran through a series of mailboxes, soared into the air over an embankment and landed in a ditch, E!Online reported.
Police said he walked away from from the wreck.
A "Jeopardy" publicist had no comment on Trebek's condition.
Trebek, a native of Canada who is now a naturalized U.S. citizen, has been the host of the syndicated quiz show "Jeopardy" since 1984.
Aaron Carter is still in love with Hilary Duff
Boston schools pull out free condoms over wrapping complaints