Steve Weinstein (born 1964) is an American professional bridge and poker player. He is known best as the youngest winner of the ACBL Life Master Pairs and the most frequent winner of the Cavendish Invitational Pairs, the world's leading contest for cash prizes. As of June 2013 he ranks number 28 among Open World Grand Masters.
Weinstein was born in New York state in 1964. At the age of 17 in 1981 he became the youngest winner of any North American Bridge Championship, the ACBL's annual Life Master Pairs, playing with his stepfather Fred Stewart.
Weinstein and Liz Davis have been together since 1986, married since 1993. They live in Andes, New York.
Weinstein worked on Wall Street until 2002 when he became a full-time professional bridge and poker player. He played poker as 'Thorladen' and mentored others. "I take top young bridge players and I train them to be top poker players", he told Online Poker in 2007. One of them was Gavin Wolpert. In 2010 Wolpert and another player created Bridge Winners (bridgewinners.com) to develop a network of bridge players online and Weinstein promptly joined the effort.
Ten years after the Life Master Pairs championship, Stewart-Weinstein were one-third of a team (USA2) that represented the U.S. in the world championship for national teams, the 1991 Bermuda Bowl, where they reached the quarterfinal. They won the Cavendish Pairs in 1993 and again in 1996.
Weinstein's regular partner for more than a decade is Bobby Levin, who may still be known best as the youngest winner of a world teams championship, the 1981 Bermuda Bowl. When forming their partnership, they spent a week with Marty Bergen in Florida to put together their system.
Levin-Weinstein have won the Cavendish Pairs five times from 1999. In the WBF World Championships Open Pairs they finished 11th in 2002, second in 2006, and first in 2010.
They were one-third of USA1 in the 2011 Bermuda Bowl, where they finished fourth. Beginning mid-2012 they joined Nick Nickell's team. The professional teams hired by Nickell had won four of the preceding nine biennial Bermuda Bowls, from 1995.