The $100,000 infield was the infield of the Philadelphia Athletics in the early 1910s. The $100,000 infield consisted of first baseman Stuffy McInnis, second baseman Eddie Collins, shortstop Jack Barry and third baseman Frank "Home Run" Baker. According to the Encyclopædia Britannica, the nickname reflects "the purported combined market value of the foursome", which is equivalent to about $2.38 million in 2023.

The Philadelphia Athletics were a Major League Baseball team that played in Philadelphia from 1901 to 1954, when they moved to Kansas City, Missouri, and became the Kansas City Athletics. Following another move in 1967, the team became the Oakland Athletics. In 2025 the franchise will move temporarily to Sacramento before permanently moving to Las Vegas.