Alfonso Ramón López was a Spanish-American professional baseball catcher and manager. He played in Major League Baseball (MLB) for the Brooklyn Robins / Dodgers, Boston Bees, Pittsburgh Pirates, and Cleveland Indians between 1928 and 1947, and was the manager for the Cleveland Indians and the Chicago White Sox from 1951 to 1965 and during portions of the 1968 and 1969 seasons. Due to his Spanish ancestry and "gentlemanly" nature, he was nicknamed "El Señor".

Catcher is a position in baseball and softball. When a batter takes their turn to hit, the catcher crouches behind home plate, in front of the (home) umpire, and receives the ball from the pitcher. In addition to this primary duty, the catcher is also called upon to master many other skills in order to field the position well. The role of the catcher is similar to that of the wicket-keeper in cricket.