|Birth Day:||July 18, 1981|
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He was originally drafted in the sixth round by the Philadelphia Flyers in the 2001 NHL Entry Draft.
As a youth, Seidenberg played in the 1994 and 1995 Quebec International Pee-Wee Hockey Tournaments with a team from Baden-Württemberg.
Seidenberg was drafted in the sixth round, 172nd overall, by the Philadelphia Flyers in the 2001 NHL Entry Draft. After spending three years with Adler Mannheim of the Deutsche Eishockey Liga (DEL) in his native Germany, he signed with the Flyers in 2002. Seidenberg spent the next two seasons bouncing between the NHL team and the American Hockey League (AHL)'s Philadelphia Phantoms, but played the entire 2004–05 season with the Phantoms during the lockout, winning the 2005 Calder Cup.
In both seasons after the lockout, Seidenberg was involved in a mid-season trade. On 20 January 2006, Seidenberg was sent to the Phoenix Coyotes for Petr Nedvěd; the following year, the Coyotes sent Seidenberg to the Carolina Hurricanes on 8 January in exchange for center Kevyn Adams.
On 14 September 2009, he signed a one-year $2.25 million contract with the Florida Panthers.
On 3 March 2010, Seidenberg and Matt Bartkowski were traded to the Boston Bruins for Byron Bitz, Craig Weller, and a second round draft pick. In June 2010, Seidenberg was re-signed by Boston to a four-year contract worth $13 million.
On 2 March 2016, he had been selected for the 2016 World Cup of Hockey where he represented Team Europe.
At the conclusion of the 2015–16 season, Seidenberg's seven-year tenure with the Bruins ended, as he was bought out from the remaining two years of his contract on 30 June 2016.
On 28 September 2016, Seidenberg signed a one-year contract with the New York Islanders. He signed a new one-year deal with the team on 24 April 2017.
After going most of the season unsigned, Seidenberg re-signed with the Islanders on a reported one-year, $700,000 contract on 26 February 2019. However, he did not play for the Islanders during the season. He announced his retirement on 23 October 2019.
Dennis married Rebecca Trainer in 2009.
Currently, Dennis Seidenberg is 40 years, 11 months and 10 days old. Dennis Seidenberg will celebrate 41st birthday on a Monday 18th of July 2022. Below we countdown to Dennis Seidenberg upcoming birthday.