The following season, Seabrook became an integral part of a young and rejuvenated Blackhawks team that made the Stanley Cup playoffs for the first time in seven years the following season in 2009. He scored 11 points in 17 post-season games as the Blackhawks made it to the Western Conference Finals, where they were defeated by the Detroit Red Wings. On March 17, 2010, Seabrook was knocked out by a high hit from James Wisniewski, a former teammate. Seabrook missed the next two games, while Wisniewski was ultimately suspended for eight games. On June 9, 2010, the Blackhawks won the Stanley Cup after defeating the Philadelphia Flyers 4–3 in overtime.