Item 5.02   Departure of Directors or Certain Officers; Election of Directors;
            Appointment of Certain Officers; Compensatory Arrangements of Certain
            Officers.

The Governance Principles of MPLX LP ("MPLX") and MPLX GP LLC, the general partner of MPLX (the "General Partner"), require that any member of the General Partner's Board of Directors (the "Board") who is also an employee (a "Management Director") of MPLX, its subsidiaries, Marathon Petroleum Corporation or its affiliates, including the General Partner (collectively, the "Marathon Group"), must tender his or her resignation from the Board following termination of employment with such entity, including a termination resulting from retirement. On November 29, 2021, consistent with the Governance Principles, the Board determined to accept resignations from Donald C. Templin and Pamela K.M. Beall, each a Management Director who retired from the Marathon Group during 2021. The resignations will be effective December 31, 2021. On November 29, 2021, the board of managers of MPC Investment LLC, the sole member of the General Partner, appointed John J. Quaid to serve as a member of the Board, effective January 1, 2022, and fixed the size of the Board at nine members, effective as of the same date. Mr. Quaid is not expected to serve on any standing committees of the Board. Mr. Quaid currently serves as the General Partner's Executive Vice President and Chief Financial Officer. As a Management Director, he will not receive compensation for his services as a member of the Board. Other than the employment relationship disclosed above, there are no arrangements or understandings between Mr. Quaid and any other persons pursuant to which Mr. Quaid was appointed to the Board. Mr. Quaid has no direct or indirect interest in any transaction or proposed transaction required to be disclosed pursuant to Item 404(a) of Regulation S-K.

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