Free agent pitcher Mike Mussina signed with the Yankees before their 2001 season began, and the club pulled away from the Red Sox as the year progressed to claim another divisional championship, as Clemens won 20 games. The September 11 attacks interrupted the season, and the resumption of baseball in New York became a symbol of how the city recovered from the destruction of the Twin Towers. After falling behind 2–0 in the ALDS against the Athletics, the Yankees won three straight contests to advance to the ALCS. They prevailed in five games against the Seattle Mariners, who had tied a single-season MLB record with 116 regular season wins, for the team's fourth straight AL pennant. The Arizona Diamondbacks gained a two-game lead in the 2001 World Series before the Yankees won three consecutive ballgames; New York home runs with two outs in the ninth inning of Games 4 and 5 led to extra inning wins in both games, with Game 4 ended by a Jeter home run. The Yankees' championship streak ended, though, as the Diamondbacks won the Series in seven games with a late rally in the final inning of Game 7.