Originally a tournament backgammon player for eight years, he eventually started playing the stock market, and then moved on to poker. He was one of the group of now famous players from the Mayfair Club, including Howard Lederer and Dan Harrington.
In his first major tournament, Seidel was runner-up in the 1988 World Series of Poker main event to Johnny Chan. This final hand was featured in the movie Rounders.
During the sixth season of the World Poker Tour, Seidel won the 2008 WPT Foxwoods Poker Classic, earning $992,890.
As of 2008, his total live tournament winnings exceed $9,200,000.
Seidel has won eight WSOP bracelets.
|1992||$2,500 Limit Hold'em||$168,000|
|1993||$2,500 Omaha 8 or better||$94,000|
|1994||$5,000 Limit Hold'em||$210,000|
|1998||$5,000 Deuce to Seven Draw||$132,700|
|2001||$3,000 No Limit Hold'em||$411,300|
|2003||$1,500 Pot Limit Omaha||$146,100|
|2005||$2,000 No Limit Hold'em||$611,795|
|2007||$5,000 World Championship No-Limit
Deuce to Seven Draw Lowball w/rebuys
Seidel is part of the design team for Full Tilt Poker.
In January 2007, Seidel finished in second place in the Aussie Millions $100k event and took home $550,000(AUD), beaten by Erick Lindgren in Heads-Up play when he moved all-in with KJ of hearts on a two-heart flop and Lindgren called with a pair of aces and his 7 kicker became an eventual straight.
In January 2008, Seidel finished in second place in the Aussie Millions $10k main event and won $1,000,000(AUD).