John Joseph Pappalau (April 3, 1875 – May 12, 1944) was an American pitcher in Major League Baseball.

[1] In 1893, Pappalau broke into baseball by playing for an independent team in Gloversville, New York.

He attended Pittsfield High School in Pittsfield, Massachusetts where, after a game in 1894, he was persuaded by a fan to play college baseball for the College of the Holy Cross.

His batterymate at Holy Cross was Doc Powers.

This biographical article relating to an American baseball pitcher born in the 1870s is a stub.