The Pittsburgh Pirates called up third baseman Ke’Bryan Hayes on September 1, 2020 for his Major League debut. His father Charlie Hayes played for the 1996 Pirates. They became the 21st group of family members to play for the Pirates. Here’s the list of all of them, sorted by using the earliest family debut date first. This doesn’t include anyone related by marriage.
John Gilbert, 1890 and Harry Gilbert, 1890 – Brothers
Billy Gumbert, 1890, 1892, Ad Gumbert, 1893-94 and Harry Gumbert, 1949-50 – Brothers-Great-Uncles/Nephew
Hans Lobert, 1903, Joe Schultz Sr, 1916 and Joe Schultz Jr, 1939-41 – Cousins, Father/Son
Howie Camnitz, 1904, 06-13 and Harry Camnitz, 1909 – Brothers
Carson Bigbee, 1916-26 and Lyle Bigbee, 1921 – Brothers
Clyde Barnhart 1920-28 and Vic Barnhart, 1944-46 – Father/Son
Johnny Morrison, 1920-27 and Phil Morrison, 1921 – Brothers
Jim Bagby, Sr, 1923 and Jim Bagby, Jr, 1947 – Father/Son
Paul Waner, 1926-40 and Lloyd Waner, 1927-41, 44-45 – Brothers
Ray Mueller, 1939-40, 1950 and Don Gutteridge, 1948 – Cousins
Elmer Riddle, 1948-49 and Johnny Riddle, 1948 – Brothers
Vern Law, 1950-51, 54-67 and Vance Law, 1980-81 – Father/Son
Johnny O’Brien, 1953, 55-58 and Eddie O’Brien, 1953, 55-58 – Brothers (Twins)
Gene Freese, 1955-58, 64-65 and George Freese, 1955 – Brothers
Matty Alou, 1966-70 and Moises Alou, 1990 – Uncle/Nephew
Al Luplow, 1967 and Jordan Luplow, 2017-18 – Great-Uncle/Nephew
Gary Kolb, 1968-69 and Danny Kolb, 2007 – Cousins
Tony Armas,1976 and Tony Armas, 2007 – Father/Son
Ravelo Manzanillo, 1994-95 and Josias Manzanillo, 2000-02 – Brothers
Charlie Hayes, 1996 and Ke’Bryan Hayes 2020 – Father/Son
Adam LaRoche, 2007-09 and Andy LaRoche, 2008-10 – Brothers