Isidro Márquez Espinoza (born May 14, 1965) is a Mexican former professional

baseball Baseball is a bat-and-ball games, bat-and-ball sport played between two team sport, teams of nine players each, taking turns batting (baseball), batting and Fielding (baseball), fielding. The game occurs over the course of several Pitch ...

pitcher In baseball, the pitcher is the player who throws ("Pitch (baseball), pitches") the Baseball (ball), baseball from the pitcher's mound toward the catcher to begin each play, with the goal of out (baseball), retiring a batter (baseball), batter, ...

. He played in

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(MLB) for the

Chicago White Sox The Chicago White Sox are an American professional baseball team based in Chicago. The White Sox compete in Major League Baseball (MLB) as a member club of the American League (AL) American League Central, Central Division. The club plays its ...

Career

Márquez played during one season at the major league level for the

. He was purchased by the

Los Angeles Dodgers The Los Angeles Dodgers are an American professional baseball team based in Los Angeles. The Dodgers compete in Major League Baseball (MLB) as a member club of the National League (baseball), National League (NL) National League West, West Div ...

from the Mexican League's Tuneros de San Luis in 1988. Márquez played his first professional season (in American baseball) with their Class A-Advanced Bakersfield Dodgers in 1988, and his last affiliated season with the White Sox and their Triple-A

Nashville Sounds The Nashville Sounds are a Minor League Baseball team of the International League and the Triple-A (baseball), Triple-A affiliate of the Milwaukee Brewers. They are located in Nashville, Tennessee, Nashville, Tennessee, and are named for the ci ...

in 1995. In 2000, he made a comeback with the Piratas de Campeche of the Mexican League. He pitched in Mexico through 2011. In 2020, Márquez was inducted into the Mexican Professional Baseball Hall of Fame. In 2021, the Piratas retired Márquez's 33 number. On 30 October 2022, the Águilas de Mexicali also retired Márquez's 33 number. In February 2025, Márquez was selected by a committee of journalists as a pitcher for the Mexican League Centennial All-Time Team on the occasion of the league's hundredth anniversary.

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1965 births Living people Águilas de Mexicali players Albuquerque Dukes players Alijadores de Tampico players Bakersfield Dodgers players Baseball players from Navojoa Broncos de Reynosa players Chicago White Sox players Major League Baseball pitchers Major League Baseball players from Mexico 20th-century Mexican sportsmen category:Mayos de Navojoa players Mexican expatriate baseball players in the United States Mexican Baseball Hall of Fame inductees Mexican League baseball pitchers Nashville Sounds players Olmecas de Tabasco players Petroleros de Minatitlán players Piratas de Campeche players Rojos del Águila de Veracruz players San Antonio Missions players Tigres del México players Tuneros de San Luis Potosí players {{Mexico-baseball-pitcher-stub