Rollie Fingers’ 17-year career epitomized the emergence of the modern-day relief ace. After watching him post inconsistent results as a starter, the A’s moved Fingers to the bullpen. He excelled quickly and frequently in his new role. Relying on a sharp slider, Fingers went on to notch 341 career saves.

Known for his handlebar mustache, Fingers became a familiar site during the post-season, appearing in 16 World Series games. He won both the American League MVP and Cy Young Award with the Brewers in 1981.