Patricio "Paddy" Martinez (1881– August 26, 1969) was an American prospector and shepherd who discovered uranium at Haystack Mesa in the San Juan Basin near Grants, New Mexico, in 1950. This was the first discovery in the Grants Uranium District, and led to a uranium boom that lasted almost 30 years. The San Juan Basin yielded 60% of the uranium in the United States, valued at over $25 billion.