Jeter became the Yankees' captain in their 2003 season. The team faced the Red Sox in the ALCS. The series came down to a seventh game, and the Yankees fell behind before three eighth-inning runs forced a 5–5 tie and extra innings. Aaron Boone, a third baseman acquired by New York in a mid-season trade, hit a walk-off home run in the 11th inning to give New York the pennant. The Yankees were then defeated by the Florida Marlins in the World Series, four games to two. The Yankees added power hitting to their lineup in the offseason, signing free agent Gary Sheffield and trading for shortstop Alex Rodriguez, who became a third baseman with New York. Three of the starting pitchers from the previous season—Clemens, Pettitte, and Wells—left the team before the season. Despite the losses, the 2004 Yankees managed to top the AL East with 101 wins and defeat the Twins three games to one in the ALDS. The victory set up an ALCS rematch with the Red Sox. The Yankees took a 3–0 series lead before losing four consecutive games, becoming the first team in MLB history to lose a best-of-seven series after winning the first three games.