Javier Alfonso López Palmer is a Puerto Rican former professional baseball pitcher. He pitched in Major League Baseball (MLB) for the Colorado Rockies (2003–05), Arizona Diamondbacks (2005), Boston Red Sox (2006–09), Pittsburgh Pirates (2010), and San Francisco Giants (2010–16). He was a left-handed specialist known for his sidearm delivery.

The San Francisco Giants are an American professional baseball team based in San Francisco. The Giants compete in Major League Baseball (MLB) as a member club of the National League (NL) West Division. Founded in 1883 as the New York Gothams, the team was renamed the New York Giants three years later, eventually relocating from New York City to San Francisco in 1958. The Giants play their home games in Oracle Park in San Francisco.