Bill Walker, a left-handed pitcher, played in Major League Baseball during the late 1920s and early 1930s. His career began with the New York Giants, where he quickly established himself as a reliable presence on the mound. Walker's debut in the major leagues came in 1927, and he soon became known for his effective pitching style, characterized by a strong fastball and a sharp curveball.

Throughout his tenure with the Giants, Walker demonstrated consistent performance. In 1929, he achieved a remarkable feat by leading the National League in earned run average (ERA) with a 3.09 mark. This accomplishment highlighted his ability to limit opposing teams' scoring opportunities and maintain control over the game. Walker's skill in keeping hitters off balance was a testament to his understanding of the game and his ability to execute pitches with precision.

Walker continued to be a valuable asset for the Giants in the early 1930s. In 1931, he once again led the National League in ERA, this time with an impressive 2.26. His performance that season underscored his role as a dependable pitcher who could be counted on to deliver strong outings. Walker's ability to consistently perform at a high level made him a crucial part of the Giants' pitching rotation.

In 1932, Walker was traded to the St. Louis Cardinals, where he continued to showcase his pitching prowess. During his time with the Cardinals, he maintained his reputation as a skilled pitcher, contributing to the team's efforts on the field. His tenure with the Cardinals further solidified his status as a capable and reliable pitcher in the league.

Walker concluded his major league career with the Cardinals in 1936. Over the course of his career, he compiled a win-loss record of 97-77 and an ERA of 3.59. His ability to maintain a low ERA throughout his career is indicative of his effectiveness as a pitcher and his capacity to compete at the highest level of the sport.

Bill Walker's career in Major League Baseball is remembered for his consistent performance and his ability to excel as a pitcher.