Frank Dwyer (1868)
Clyde Milan (1887)
John Fetzer (1901)
Dutch Leonard (1909)
Jimmie Crutchfield (1910)
Lester Lockett (1912)
Ryohei Hasegawa (1930)
Woodie Held (1932)
Frank Peters (1944)
Lee Mazzilli (1955)
Jeff Kunkel (1962)
Tom Glavine (1966)
Erik Schullstrom (1969)
Travis Fryman (1969)
Dan Wilson (1969)
Neal Cotts (1980)
Hyun Jin Ryu (1987)
Mike Zunino (1991)
John Fetzer was the majority owner of the Detroit Tigers from 1961-1983.
Ryohei Hasegawa was a star in Japan in the 1950s and was also a coach, manager, and broadcaster there.
Frank Peters was a minor league player and manager. On August 31, 1974, while managing the Portland Mavericks, he had each player play each position for one inning. Portland won the game over the Tri-City Ports, 8-7.
There were six major league players born on March 25, 1969. In addition to the three listed above, Eric Helfand, Paul Menhart, and Scott Sanders were born on that date. I don't know whether that's a record, but it seems like it has to be pretty close.