Joey Chestnut, two-time defending rib eating champion at the Nugget Best in the West Rib Cook-off, makes a good living as a competitive eater.The 28-year-old San Jose resident, who has won the Nathan's Famous July 4 International Hot Dog Eating Contest six years running, says he cleared more than $200,000 each of the last three years as a professional eater not bad for a guy who cut his teeth in the sport chowing down on lobsters at Boomtown.Chestnut will be in Sparks again on Wednesday to defend the rib-eating title he's won five times since the contest began in 2006 …