March 9 is a great day for Major League Baseball, when you consider the players that were born on this day!
MLB Hall of Famer Billy Southworth was born on March 9, 1893. He was the first person in MLB history to win a World Series as a player and later as a manager. As manager, his .642 winning percentage remains 2nd most in St. Louis Cardinals franchise history. There is a great documentary that covers his life, and SABR offers a thorough profile.
Fellow MLB Hall of Famer Arky Vaughan was also born on March 9, almost twenty years later. Vaughan is considered one of the greatest shortstops, and SABR once again comes through with an excellent biography article about the often forgotten star of his era.
Benito Santiago, born on March 9, 1965, logged 20 seasons in MLB, a large chunk of which was with the San Diego Padres, where he started his career. The five time All-Star was also the 1987 NL Rookie of The Year. He had a resurgence in the early 2000s, and was the NLCS MVP in 2002 with the San Francisco Giants.
Rounding out the March 9 birthdays is Aaron Boone, perhaps best known for his soul crushing home run to end Game 7 and the 2003 ALCS, defeating the Boston Red Sox and sending the New York Yankees to the World Series. The eventually lost to the Florida Marlins and would not win another World Series Championship until 2009. As for Aaron Boone, he missed all of 2004 to injury, which prompted the Yankees to acquire Alex Rodriguez. Boone went on to play a few more seasons before retiring and joining ESPN as a commentator.