Mortimer Martin "Mert" Hackett (November 11, 1859 – February 22, 1938) was an American professional baseball catcher.
He played in Major League Baseball from 1883 to 1887 for the Boston Beaneaters, Kansas City Cowboys, and Indianapolis Hoosiers.
[1] A native of Cambridge, Massachusetts, Hackett made his major league debut with the 1883 Boston Beaneaters.
[2] From 1888 to 1891, he played for the Hyannis town team in what is now the Cape Cod Baseball League.
[3][4][5] Hackett died in his hometown of Cambridge in 1938 at the age of 78, and is interred at St. Paul Cemetery in Arlington, Massachusetts.