POWER OF ATTORNEY
KNOW ALL PERSONS BY THESE PRESENTS, that I hereby constitute and
appoint Kim K.W. Rucker, Carrie P. Ryan, Elisa D. Watts and Jean M. Mosel, and each
of them, as my true and lawful attorney-in-fact and agent and in my 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 I 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,
and concurrently revoking all prior appointments for these purposes. This authorization,
unless earlier revoked by me in writing, shall be valid until my reporting obligations
under Section 16 with respect to equity securities of the Company shall cease.
Effective Date: January 23, 2017
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Signature