Well, hell. Per the Wikipedia page for Curt Schilling...
"On October 19, 2004, Schilling won Game 6 of the 2004 American League Championship Series against the New York Yankees. Notably, he won this game playing on an injured ankle—the same injuries that contributed to his disastrous outing in Game 1 of the ALCS. These injuries were so acute that by the end of his performance that day his white sock was soaked with blood, which is now referred to as "the bloody sock". Following the game, Schilling took the famous sock and threw it away in the Yankee Stadium clubhouse. The win forced a Game 7, making the Red Sox the first team in MLB history to come back from a three-games-to-none deficit. The Red Sox would go on to win Game 7 and the ALCS and make their first World Series appearance since 1986. Schilling pitched (and won) Game 2 of the 2004 World Series for the Red Sox against the St. Louis Cardinals. In both series, he had to have the tendon in his right ankle stabilized repeatedly, in what has become known as the Schilling Tendon Procedure, after the tendon sheath was torn during his Game 1 ALDS appearance against the Los Angeles Angels of Anaheim. As in Game 6 of the ALCS, Schilling's sock was soaked with blood from the sutures used in this medical procedure, but he still managed to pitch seven strong innings, giving up one run on four hits and striking out four. This second bloody sock was placed in the Baseball Hall of Fame after Boston's victory over St. Louis in the World Series. A four-game sweep of the World Series erased the Curse of the Bambino. On February 23, 2013, the bloody sock was sold at a live auction at the Fletcher-Sinclair Mansion for $92,613 to an anonymous bidder."