Mastrogiannis has cashed three times at the World Series of Poker and won two bracelets. He won his first bracelet in 1979 in the $1,000 Razz event.[3] He won his second bracelet in 1986 in the $1,500 Seven Card Stud event.[4]
Sam Mastrogiannis invested his poker winnings and started his own shoe company. His shoe line was called the Mastroni. The shoes were sold at Nordstrom under the signature label.
