John Wesley "Jack" Glasscock, often referred to as "Pebbly Jack," was a professional baseball player whose career spanned the late 19th century. Born on July 22, 1857, in Wheeling, West Virginia, Glasscock became known for his exceptional skills as a shortstop. His career began in the National League with the Cleveland Blues, where he quickly established himself as a reliable infielder.

Glasscock's defensive prowess was one of his defining characteristics. He was renowned for his fielding abilities, particularly his quick reflexes and strong throwing arm. These skills earned him a reputation as one of the best shortstops of his era. Throughout his career, he played for several teams, including the St. Louis Maroons, Indianapolis Hoosiers, New York Giants, and Louisville Colonels, among others.

In addition to his defensive skills, Glasscock was also a competent hitter. He consistently posted solid batting averages, often ranking among the league leaders. In 1890, while playing for the New York Giants, he won the National League batting title with an average of .336. This achievement highlighted his ability to contribute offensively as well as defensively.

Glasscock's career was marked by several standout seasons. In 1889, he led the league in hits and doubles, showcasing his ability to make consistent contact and drive the ball into gaps. His performance that year helped the New York Giants secure the National League pennant. Glasscock's contributions were instrumental in the Giants' success during that period.

Despite the challenges of playing in an era with less advanced equipment and rougher playing conditions, Glasscock maintained a high level of performance throughout his career. His dedication to the game and his consistent play earned him the respect of his peers and fans alike.

After retiring from professional baseball, Glasscock returned to his hometown of Wheeling, where he lived until his passing on February 24, 1947.

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