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

On November 16, 2022, the board of managers of MPC Investment LLC, the sole member of MPLX GP LLC, the general partner (the "General Partner"), of MPLX LP (the "Partnership"), increased the size of the board of directors of the General Partner (the "Board") to ten members and elected Christine S. Breves to serve on the Board as a director, effective November 16, 2022. Ms. Breves is expected to serve on the audit committee and conflicts committee of the Board.

As a non-employee director, Ms. Breves will receive compensation in the same manner as the Board's other non-employee directors. The terms of non-employee director compensation were disclosed in the Partnership's Annual Report on Form 10-K for the year ended December 31, 2021, filed with the Securities and Exchange Commission on February 24, 2022.

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