World Series of Poker

Number of seasons: 42 seasons

Returning Series

The World Series of Poker is a series of poker tournaments held annually in Las Vegas and, since 2004, sponsored by Caesars Entertainment Corporation. It dates its origins to 1970, when Benny Binion invited seven of the best-known poker players to the Horseshoe Casino for a single tournament, with a set start and stop time, and a winner determined by a secret ballot of the seven players.