Elmer Knetzer, a right-handed pitcher, played in Major League Baseball during the early 20th century. Born on July 22, 1885, in Carrick, Pennsylvania, Knetzer began his professional baseball career in the minor leagues before making his way to the majors. His journey to the big leagues started with the Pittsburgh Pirates, where he debuted on September 26, 1909.

Knetzer's time with the Pirates was brief, and he soon found himself with the Brooklyn Superbas, later known as the Dodgers. It was with Brooklyn that he spent a significant portion of his career, from 1910 to 1914. During his tenure with the team, Knetzer developed a reputation as a reliable pitcher. In the 1912 season, he achieved a personal best with 16 wins, showcasing his ability to contribute effectively to the team's pitching rotation.

After his stint with Brooklyn, Knetzer moved to the Pittsburgh Rebels of the Federal League in 1914. The Federal League was a short-lived third major league that sought to challenge the established National and American Leagues. Knetzer played two seasons with the Rebels, where he continued to demonstrate his pitching skills. In 1915, he recorded 13 wins, further solidifying his role as a dependable pitcher.

Following the dissolution of the Federal League, Knetzer returned to the National League, joining the Boston Braves in 1916. His time with the Braves was marked by a steady performance, although he did not replicate the same level of success he had experienced earlier in his career. Knetzer's major league career concluded with the Cincinnati Reds in 1917, where he played his final games.

Throughout his career, Knetzer was known for his consistent pitching and ability to handle the demands of the mound. His career statistics include a win-loss record of 69-69, an earned run average (ERA) of 3.20, and 522 strikeouts. These numbers reflect his role as a solid pitcher during an era when the game was evolving and becoming more competitive.

Elmer Knetzer's career in baseball spanned several teams and leagues, illustrating the dynamic nature of the sport during the early 1900s.