John Thomas Sardinha (December 21, 1931 – February 19, 2018) was an American baseball pitcher who played with the Nankai Hawks of Japan's Nippon Professional Baseball for two seasons, 1959 and 1960.

Sardinha played amateur baseball on Maui, as well as with the Honolulu Asahis club.

In an eight-inning contest against Canada, he allowed only three hits; he also held Japan to three runs in the tie-breaker semifinal.

[2][3] In 1959, he joined Andy Miyamoto and Ichiro Maehara as players from Pu'unene playing professional baseball in Japan.

A submarine pitcher, Sardinha started the season off hot but overworked himself.