Exhibit 24.1

 

TESARO, INC.

 

POWER OF ATTORNEY

 

KNOW ALL MEN BY THESE PRESENTS that the undersigned Officers and Directors of TESARO, Inc., a Delaware corporation (the “Corporation”), hereby constitute and appoint Leon O. Moulder, Jr., Timothy R. Pearson and Joseph L. Farmer, and each of them, the true and lawful agents and attorneys-in-fact of the undersigned with full power and authority in said agents and attorneys-in-fact, and any one or more of them, to sign for the undersigned and in their respective names as Officers and as Directors of the Corporation one or more registration statements on Form S-8 (each, a “Registration Statement”) of the Corporation to be filed with the Securities and Exchange Commission under the Securities Act of 1933, as amended, and any amendment or amendments to such Registration Statements, relating to securities of the Corporation acquired under or to be offered under (a) the TESARO, Inc. 2012 Omnibus Incentive Plan, as amended, and (b) the TESARO, Inc. 2012 Employee Stock Purchase Plan, as amended, and the undersigned hereby ratify and confirm all acts taken by such agents and attorneys-in-fact, or any one or more of them, as herein authorized.