Diosdado Posadas (December 25, 1906 – July 2, 1990), better known as Speedy Dado, was a Filipino boxer who contended for the world flyweight, bantamweight, and featherweight championships.

[1] On February 10, 1931, Dado defeated Newsboy Brown at the Olympic Auditorium in Los Angeles for the vacant USA California State bantamweight championship.

[1] Reigning world bantamweight champion Panama Al Brown fell to Dado in a non-title ten-round decision on January 4, 1932, at Olympic Auditorium in Los Angeles.

He lost a ten-round points decision in Los Angeles on January 25, 1933, to Baby Arizmendi for the California version of the world featherweight title.

[9][10] In a previous meeting at Hollywood Stadium with Palmore on February 10, 1933, Dado had been embarrassed by a first-round knockout from a short overhand right to the jaw, 1:15 into the first round.

[11] He lost on March 21, 1933, to Freddie Miller for the National Boxing Association featherweight title at the Olympic Stadium in Los Angeles.

[12] In a widely publicized bout on June 9, 1933, Dado drew with former Canadian bantamweight champion Pete Sanstol in a ten-round points decision at Dreamland in San Francisco.

[13][14] On October 24, 1933, Dado defeated Young Tommy, a fellow Filipino, in a ten-round points decision at Olympic Auditorium in Los Angeles for the USA California State Bantamweight title.

[15] On May 19, 1933, Young Tommy won the state title against Dado in a ten-round points decision at Dreamland Auditorium in San Francisco.

He lost to Merv Darky Blandon, Australian bantamweight champion, in a fifteen-round points decision on April 11, 1934, at Sydney Stadium.

[18][19] On June 2, 1934, Dado could not continue boxing in the seventh round after tearing an ankle ligament after a collision with the referee, losing his bout with future Australian bantamweight champion Mickey Miller in Melbourne, Australia.

[20][21][22] Dado successfully defended his USA California State bantamweight title on September 28, 1934, in a close and furious ten round points decision against Joe Tei Ken in San Francisco.

Dado defeated future bantamweight champion Lou Salica on October 19, 1934, in a ten-round points decision before a full house at Legion Stadium in Hollywood.

Dado took the offense in most of the contest and fought with his characteristic speed, but seemed to coast after the first thirty seconds of several rounds, exhibiting reduced endurance from his earlier years.

[25][26] Before a significant crowd of 10,400, Dado lost a May 21, 1935 fight against Pablo Dano for the California and New York version of the bantamweight world title.

[29] According to a widely distributed UP press report of February 23, 1943, Dado was shot and wounded at a Los Angeles area cafe, following an altercation with 36-year old special policeman Clyde Vickers.