POWER OF ATTORNEY
KNOW ALL PERSONS BY THESE PRESENTS, that Edward G. Galante
constitutes and appoints Carrie P. Ryan and Jean M. Mosel, and each of them, as his/her
true and lawful attorney-in-fact and agent for him/her and in his/her name, place and
stead, in any and all capacities, to sign any or all Forms 3, 4, and 5 relating to equity
securities of Tesoro Corporation (the "Company") pursuant to the requirements of
Section 16 of the Securities Exchange Act of 1934, and to file the same with the
Securities and Exchange Commission and the New York Stock Exchange, granting unto
said attorney-in-fact and agent full power and authority to do and perform each and every
act and thing requisite and necessary to be done in about the premises, as fully to all
intents and purposes as he/she might or could do in person, hereby ratifying and
affirming all that said attorney-in-fact and agent may lawfully do or cause to be done by
virtue hereof. This authorization, unless earlier revoked by the undersigned in writing,
shall be valid until the undersigned's reporting obligations under Section 16 with respect
to equity securities of the Company shall cease.
Date: March 1, 2016
Edward G. Galante
