Dado was born Diosdado B. Posadas in Manila on December 25, 1906. In an era when Asian boxers would often be referred to only by their nationality, he took the last two syllables of his birth name to use in the ring. In his career, he would be a top-rated contender for world titles in three separate weight divisions, and fight championship matches in each weight class.
World Fly title attempt, April, 1928 He began his boxing career in 1926. Winning nearly all of his early bouts, he lost his first against
Newsboy Brown on April 24, 1928, for the California version of the world flyweight title. Brown defeated him by technical knockout due to Dado's shoulder injury in the sixth round. The fighting was back and forth until the sixth, when Dado, taking a beating, suffered a dislocated shoulder. He met Brown twice more, winning one fight and losing the other. In the seventh, Dado unleashed a fury of punches that had Brown groggy. The
San Francisco Examiner gave Dado only six rounds, but agreed Dado's win was decisive. Despite a six-inch disadvantage in height, and a significantly shorter reach, Dado had the speed to get close. On November 15, 1932, Dado defeated Rodolfo Casanova in a well publicized main bout before 10,000 at the Olympic Auditorium in Los Angeles. Dado floored Casanova twice in the first round, once for counts of seven and five, but Casanova fought back and appeared to take the second. The
Los Angeles Times gave four rounds to Dado, with the fourth, sixth and tenth to Casanova, with three even. Dado fought for world titles on three other occasions, losing both of them. 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. Arizmendi, in a clear victory, was credited with five rounds to only one for his Filipino challenger. Arizmendi handily took the fifth through seventh rounds. In their two previous bouts, each boxer had won once. Dado defeated Baby Palmore on March 10, 1933, in a ten-round points decision in Hollywood. In a convincing victory, the
Los Angeles Times wrote that Dado won all but the fourth round. The fifth started with Palmore clipping Dado with three strong rights to the chin that left him reeling, but Dado retaliated getting Palmore against the ropes, and continued to take the lead in the sixth through tenth. Earth tremors occurred during the bout. 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.
Attempt at world feather title, March, 1933 He lost on March 21, 1933, to
Freddie Miller for the
National Boxing Association featherweight title at the Olympic Stadium in Los Angeles. Miller won seven of the ten rounds, and had Dado on the floor for a six count from a strong right to the head in the second round. Dado took only rounds three and seven. 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. Both boxers boxed cautiously in the tame bout, though Sanstol appeared the aggressor. Several local papers wrote that Dado may have had a very slight edge in points. 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. The crowd of 7,000 saw Dado use somewhat better defensive skills, and greater speed, though Tommy may have delivered the stronger blows at times. In a close bout, Dado took five rounds, Tommy four, and one was even. On May 19, 1933, Young Tommy won the state title against Dado in a ten-round points decision at Dreamland Auditorium in San Francisco. In a previous bout on October 12, 1932, Dado decisively defeated Young Tommy for the state bantamweight title in a ten-round points decision in Oakland. Dado took seven of the ten rounds, and showed great speed in the victory before a capacity crowd. Midway in the second, Tommy was down for a no-count from a left hook to the jaw. The final round was continuous action, and fought at great speed. Tommy would later defeat Dado in a ten-round non-title bout in Los Angeles on December 4, 1934.
Boxing in Australia, 1934 Dado fought three high-profile bouts through the summer of 1934 in Australia. He lost to Merv Darky Blandon, Australian bantamweight champion, in a fifteen-round points decision on April 11, 1934, at Sydney Stadium. Blandon's right hand proved too much for Dado whose careful boxing was not enough to take the decision. On April 24, 1934, Dado lost again to Blandon in a close bout at Sydney Stadium before an impressive crowd of 12,000. Blandon took the offense more frequently and scored with straight lefts and right swings at many points in the match. Dado also scored with lefts to the body, with fierce attacks throughout the bout, but showed more caution when getting in close. A cut near Dato's right eye in the twelfth may have affected his boxing in the late rounds. 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. Miller appeared to have a comfortable margin in points prior to the collision. Dado was rated in the top five among bantamweights in the world at the time. 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. Two furious spurts in the ninth and tenth rounds finally sealed the decision in Dado's favor. The
Reno Gazette gave Dado six rounds in the close bout with only three to Dado. With the slightest reach advantage, Dado seemed to have the upper hand at close quarters fighting. In a match one week earlier, Dado had been disqualified in the third round for dropping to the canvas, and then immediately dropping to one knee after arising. Dado had won in two previous matches between the two. 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. The
San Francisco Examiner gave Dado six rounds, Salica three, and one even.
World bantam title attempt, May, 1935 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. Dano was particularly effective in delivering blows to the body and stomach of his opponent, and took the offensive in the fighting from the early rounds. He scored a no-count knockdown in the second round. Dano was given recognition by the National Boxing Assocication if he would box Pablo Escobar, so the same recognition may have been given to Dado had he won, granting him his only widely recognized world title. The loss relegated Dado to secondary status as a boxer. At 28, with fifteen years of boxing behind him, Dado had taken too much pounding to stay a top rated competitor. Although he never won a world title, he defeated two champions and drew with reigning world flyweight champion
Midget Wolgast. Dado lost to Wolgast in two other meetings. ==Professional boxing record==