20 March 1945
Water Tender First Class Mazanek served aboard the destroyer USSHalsey Powell (DD-686). On March 20, 1945 the Halsey Powell was being refueled along side the USS Hancock (CV-19), when a kamikaze aircraft overshot the Hancock and struck Halsey Powell in the fantail, resulting in 12 fatalities and over 30 wounded.
WT1c Mazanek was buried at sea. He is memorialized on the Tablets of the Missing at Honolulu Memorial, Honolulu, Hawaii.