John Elmer Stivetts (March 31, 1868 – April 18, 1930) was a professional baseball pitcher who played 11 seasons in Major League Baseball (MLB) spanning from 1889 to 1899. He played in the American Association (AA) with the St. Louis Browns, and in the National League (NL) with the Boston Beaneaters and Cleveland Spiders. "Happy Jack" (nicknamed due to his pleasant demeanor) was born to German immigrants and raised in Ashland, Pennsylvania. He initially followed his father into the coal mining industry before playing professional baseball. After playing two and half seasons in minor league baseball, he was signed by the Browns. Over the next few seasons, he was regarded as one of the best pitchers in baseball.