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As of 2009, he has cashed fourteen times in the World Series of Poker (WSOP), including a 2nd place finish in $2,500 Omaha Hi-Lo Split event in 2000, and a 4th place finish in the $10,000 no limit Texas hold 'em Main Event in the same year, for which he took home $326,000. In September 2005, he won the opening No Limit Hold'em event of PokerStars' fourth annual World Championship of Online Poker, taking home $306,000.
He finished 7th in the 2000 World Series of Poker (WSOP) $10,000 no limit Texas hold'em main event, winning $146,700 after losing two big pots to eventual winner Chris Ferguson.
Arieh finished 3rd in the 2004 World Series of Poker (WSOP) main event and has a World Series of Poker title in Limit Texas hold 'em in 1999 and a 2nd place finish at the 2000 World Series of Poker Pot Limit Omaha event to Johnny Chan.