Carl Yastrzemski Hits His 400th HR On this day, in 1965 Carl Yastrzemski became the 18th major-league hitter in MLB history to reach the 400 home run mark, Yaz was 39 years old at the time. July 24, 1965 Sport: Baseball Trivia Which Nations Won the Gold, Silver and Bronze Medals the Last Time Baseball Was an Olympic Sport? What Are the Five Events That Make Up the Modern Olympic Pentathon? sports in this article Baseball tags in this article Fan On This Day SportsEngine