Moon earned the chip lead early in the tournament, and eventually entered the final table as the chip leader, with about 30 percent of the chips in play. Although Moon briefly lost the lead, he eventually regained it after eliminating veteran players like Steve Begleiter and Phil Ivey. Moon ultimately lost heads up against Joe Cada, earning Moon US$5.18 million for his second-place finish.
Although some criticized his playing style and lack of experience, Moon was also praised for his working stiff personality and self-deprecating manner. Moon participated in the 2010 National Heads-Up Poker Championship, but lost in the second round to poker professional Annie Duke. He also competed in the 2010 World Series of Poker Main Event, but was eliminated on Day 2.
Moon lives in the western Maryland town of Oakland, at the foot of Backbone Mountain. Prior to entering the World Series of Poker, Moon lived in a 14 by 70 feet (4.3 by 21.3 m) trailer with his wife, Wendy. Moon owns and operates a small logging company with other family members. Most of his days were spent in pine forests scattered throughout the Maryland Panhandle. Moon taught himself how to play poker, and he first started playing with his grandfather at a young age. He started playing frequently around 2006 and studied the game by watching televised poker. Moon regularly played home games at such places as fire departments, Elks Lodges and American Legion buildings.
Moon earned his seat in the 2009 World Series of Poker no-limit Texas hold'em Main Event by winning a $130 satellite tournament at the Wheeling Island Casino in Wheeling, West Virginia. He lost in two Wheeling Island tournaments before finishing in first place on his third attempt, winning a $10,000 main event seat and $6,000 for expenses. The event marked Moon’s first time playing in the WSOP, as well as visiting Las Vegas, Nevada and riding in a commercial plane. Due to the poor economy's impact on the logging business, Moon considered keeping the $10,000 instead of entering the tournament, but decided to play after visiting the Rio All Suite Hotel and Casino and watching World Series games there.