Modern fantasy sports began in 1980 with the invention of Rotisserie League Baseball by New York writer Daniel Okrent and several friends. Participants in a Rotisserie league draft notional teams from the list of active MLB players and play out an entire imaginary season with game outcomes based on the players' latest real-world statistics. Rotisserie-style play quickly became a phenomenon. Now known more generically as fantasy baseball, it has inspired similar games based on an array of different sports. The field boomed with increasing Internet access and new fantasy sports-related websites. By 2008, 29.9 million people in the United States and Canada were playing fantasy sports, spending $800 million on the hobby. The burgeoning popularity of fantasy baseball is also credited with the increasing attention paid to sabermetrics—first among fans, only later among baseball professionals.