Henry Mathewson (December 24, 1886 – July 1, 1917) was an American professional baseball player that appeared in three games with the National League's New York Giants between the 1906 and 1907 seasons. A younger brother of Hall of Famer Christy Mathewson, Henry Mathewson's career was primarily spent pitching semi-professional baseball until his death at the age of 30. Early life Henry Mathewson was born on December 24, 1886, as the fourth of six children. Henry was the third of four Mathewson brothers, after older brothers Christy and Cyril (who died as an infant), and before younger brother Nicholas. His father, Gilbert, was a postmaster for the United States Senate, and his mother, Minerva, was a leader of the local Woman's Christian Temperance Union. Minerva was said to be responsible for teaching Henry and the other Mathewson brothers to throw. Major league career Henry was first offered a professional contract by the Chicago Cubs during the spring of 1906; he turned down their offer so that he could join Christy with the New York Giants; by that time, the elder Mathewson had established himself as a star by winning the pitching Triple Crown in 1905. Due to Christy's fame, Henry Mathewson was much written about in the press as the "next Matty" throughout his career. Despite the hype, Henry did not pitch well in exhibition games. Ultimately, he spent much of 1906 pitching in semi-professional leagues. When his semi-pro season ended in September, Henry was brought up to the major league roster. At nineteen years of age, he was the youngest player in the National League at that time. Henry's debut in 1906, on September 28, saw him replace his brother, Christy, to finish an 8-2 Giants victory against the St. Louis Cardinals. Henry faced five batters in his inning of work and did not allow a walk or a hit; he was, however, responsible for allowing a run during his time on the mound. He was retroactively credited with a save for his efforts. On October 5, the final day of the regular season, Henry was given a start against the last place Boston Beaneaters. Facing Big Jeff Pfeffer, Mathewson gave up one run over the first six innings, matching Pfeffer, but struggled over the next three by giving up six runs and lost 7-1. Despite giving up only six hits, compared to Pfeffer's nine, he had major control