Aaron Shawn Estes is an American former professional baseball pitcher who played 14 seasons in Major League Baseball (MLB). He played in MLB for the San Francisco Giants, New York Mets, Cincinnati Reds, Chicago Cubs, Colorado Rockies, Arizona Diamondbacks, and San Diego Padres.

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.