At the conclusion of the 2009–10 regular season, Bäckström finished fourth in NHL scoring with 101 points, behind Henrik Sedin (112), Sidney Crosby (109) and teammate Alexander Ovechkin (109). Bäckström scored his first career Stanley Cup playoff hat-trick, including the overtime game-winner, against the Montreal Canadiens in the first round of the 2010 playoffs, a series Washington ultimately lost in seven games. On 17 May, shortly after the end of the Capitals' season, Bäckström signed a ten-year, $67 million contract extension with the team.