The Wrestling Observer Newsletter (WON) is a newsletter that covers professional wrestling and mixed martial arts.

David Allen Meltzer is an American journalist who reports on professional wrestling and mixed martial arts. Since 1983, Meltzer has been the publisher and editor of the Wrestling Observer Newsletter (WON), a dirtsheet primarily addressing professional wrestling. He has also written for the Oakland Tribune, the Los Angeles Times, Yahoo! Sports, SI.com, and The National Sports Daily. He has extensively covered mixed martial arts since UFC 1 in 1993 and also covers the sport for SB Nation. He has been called "the most accomplished reporter in sports journalism" by Frank Deford of Sports Illustrated.