World Series of Poker Event Cap

D7 Hat/Cap World Series of Poker Adult Adjustable Strap with Clasp WORLD SERIES of POKER in redwhite/2tone blue dome with light green accents and bill. The World Series of Poker (WSOP) is a series of poker tournaments[1] held annually in Paradise, Nevada and, since 2004, sponsored by Caesars Entertainment. 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.[2]