Baseball History · On This Day On This Day: June 24 Posted on June 24, 2020 by Baseballia 1955 In an 18 – 7 loss to the Tigers, Senators 18-year-old rookie third baseman Harmon Killebrew hits his first major league home run off Billy Hoeft. “Killer” will finish his 22-year Hall of Fame career with 573 homers.