b. April 17, 1820 · Credited by the Hall of Fame with writing the rules of baseball, a claim historians have been picking apart ever since.

b. April 17, 1852 · The first man to 3,000 hits, with a career total the archive cannot settle: 3,012 by today's accounting, 3,435 counting the National Association.

b. April 17, 1862 · Center fielder across two clubs, 1884 to 1884.

b. April 17, 1863 · Pitcher who batted .288 for the Philadelphia Quakers, 1884 to 1887.

b. April 17, 1864 · Pitcher who batted .153 across nine clubs, 1883 to 1891.

b. April 17, 1870 · First baseman for the Brooklyn Superbas, 1905 to 1905.

b. April 17, 1875 · Pitcher for the Detroit Tigers, 1904 to 1904.

b. April 17, 1903 · Pitcher across two clubs, 1925 to 1931.

b. April 17, 1903 · Pitcher for the Philadelphia Phillies, 1929 to 1929.

b. April 17, 1906 · Second baseman across two clubs, 1929 to 1933.

b. April 17, 1907 · Shortstop for the Philadelphia Phillies, 1931 to 1931.

b. April 17, 1909 · Second baseman for the Philadelphia Phillies, 1936 to 1936.

b. April 17, 1917 · Pitcher for the Newark Eagles, 1939 to 1944.

b. April 17, 1945 · Catcher for the Kansas City Royals, 1969 to 1974.

b. April 17, 1957 · Catcher across two clubs, 1983 to 1985.

b. April 17, 1965 · Third baseman who batted .230 across four clubs, 1988 to 1996.

b. April 17, 1967 · Stole 76 and 78 bases in consecutive seasons and caught the last out of the 1995 World Series.

b. April 17, 1969 · First baseman for the San Francisco Giants, 1998 to 1998.

b. April 17, 1972 · Catcher who batted .241 across eight clubs, 1995 to 2008.

b. April 17, 1984 · Had his best season at thirty-four, signed a contract on the strength of it, and played nine games in two years.

b. April 17, 1987 · Pitcher across five clubs, 2012 to 2019.

b. April 17, 1989 · Pitcher across five clubs, 2015 to 2021.

b. April 17, 1990 · Pitcher for the Miami Marlins, 2017 to 2018.

b. April 17, 1993 · Pitcher for the Los Angeles Angels of Anaheim, 2016 to 2016.

d. April 17, 1883 · Catcher across two clubs, 1876 to 1880.

d. April 17, 1893 · Third baseman who batted .232 across two clubs, 1882 to 1886.

d. April 17, 1898 · Pitcher who won 297 games in the sport's earliest professional decades and threw the first pitch in the first professional league game.

d. April 17, 1912 · Second baseman for the Chicago Colts, 1895 to 1895.

d. April 17, 1923 · Pitcher for the Syracuse Stars, 1890 to 1890.

d. April 17, 1933 · First baseman for the Milwaukee Brewers, 1884 to 1884.

d. April 17, 1937 · Pitcher across two clubs, 1908 to 1911.

d. April 17, 1938 · Pitcher for the Pittsburg Alleghenys, 1889 to 1889.

d. April 17, 1946 · Spitball pitcher who won 247 games across twenty-three seasons and was still pitching in the majors at fifty.

d. April 17, 1948 · Catcher across two clubs, 1902 to 1903.

d. April 17, 1959 · First baseman for the New York Giants, 1914 to 1916.

d. April 17, 1960 · Catcher for the Washington Senators, 1920 to 1922.

d. April 17, 1964 · Left fielder for the Chicago White Sox, 1918 to 1927.

d. April 17, 1967 · Right fielder across two clubs, 1903 to 1904.

d. April 17, 1970 · Catcher who batted .244 across four clubs, 1957 to 1965.

d. April 17, 1973 · Pitcher across three clubs, 1919 to 1931.

d. April 17, 1979 · Pitcher for the Pittsburgh Pirates, 1913 to 1915.

d. April 17, 1980 · First baseman across two clubs, 1912 to 1918.

d. April 17, 1980 · Pitcher across two clubs, 1941 to 1947.

d. April 17, 1983 · Threw a knuckleball for twenty seasons and was one of four knuckleballers in Washington's 1945 rotation.

d. April 17, 1991 · Second baseman who batted .283 across two clubs, 1931 to 1935.

d. April 17, 1996 · Third baseman who batted .251 for the Chicago Cubs, 1949 to 1954.

d. April 17, 2012 · Left fielder across two clubs, 1960 to 1961.

d. April 17, 2023 · Pitcher across three clubs, 1977 to 1982.