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Homero Blancas, Jr. (born March 7, 1938) is an American professional golfer who has played on both the PGA Tour and the Senior PGA Tour (now known as the Champions Tour).

Blancas, who is of Mexican American descent, was born in Houston, Texas.[1] He attended the University of Houston from 1958–1962, and was a member of the golf team. Blancas shot a record-setting round of 55 (27-28) in a college tournament, which stands as the lowest round in the history of competitive golf. His 13 birdies and an eagle on a par-70 course in Longview, Texas on August 19, 1962 earned him the nickname "Mr. 55". He was inducted into the University of Houston Athletics Hall of Fame in 1978.