1899 – Born in Culloden, Georgia on the 5th of April.
1913 – Entered Georgia Military Academy, a preparatory school for the University of Georgia.
1918 – Graduated from the University of Georgia with an A.B. at the age of 19.
1922 – Blalock earned his medical degree at Johns Hopkins.
1925 – With Harrison at Vanderbilt University in Nashville to serve as first chief resident in surgery.
1927 – Published his first paper on shock
1938 – He tried to produce pulmonary hypertension in experiments joining the left subclavian artery to the left pulmonary artery.
1941 – Offered Chief of Surgery at Johns Hopkins Hospital.
Collaborator with Vivien Thomas.