A Democrat from the Tenth District, the fifty-three year old physician and wheat grower lived in Walla Walla.
Born in North Carolina, Blalock was graduated from Jefferson Medical College and practiced medicine for twelve years in Decatur, Illinois. He had been an assistant surgeon in the army. In 1873, he came to Walla Walla.
Blalock served on the following committees: Education and Educational Institutions, chairman; State, County and Municipal Indebtedness; State Medicine and Public Health; reporting proceedings.