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MPLX Vice President of Operations Craig O. Pierson to retire

FINDLAY, Ohio, Nov. 28, 2016 - MPLX LP (NYSE: MPLX) today announced the retirement of Craig O. Pierson, vice president of Operations of MPLX GP LLC, MPLX's general partner, and president of MPLX's subsidiary, Marathon Pipe Line LLC, effective Jan. 1. Timothy J. Aydt, who is currently general manager, Terminal, Transport & Rail at Marathon Petroleum Corporation (NYSE: MPC), will replace Pierson as vice president of Operations and president of Marathon Pipe Line and report to John Swearingen, MPC senior vice president of Transportation and Logistics and vice president, Crude Oil and Refined Products Pipelines of MPLX's general partner

Pierson joined Marathon in 1978 as a pipeline engineer and held numerous positions of increasing responsibility in pipeline, transportation and logistics and has had experience in the marketing sector. Pierson was named vice president of operations for Marathon Pipe Line in 2005 and assumed the role of president in 2011.

"Craig has made significant and lasting contributions to the pipeline organization, leading its growth into the flexible and integrated system we operate today," said MPLX President Donald C. Templin. "His expertise and focus on safety, environmental performance and operational excellence have contributed to our reputation as one of the most respected pipeline operators in the nation. All of us at MPLX and MPC thank him for his decades of service and wish him well in retirement."

Aydt began his career with MPC in 1985 as a pipeline engineer. He has held senior management positions throughout the company, including assignments in Marketing & Transportation Engineering and at MPC's refineries in Detroit and Robinson, Illinois. Aydt was named general manager of Terminal, Transport & Rail in 2013, following the completion of the $2.2 billion Detroit Heavy Oil Upgrade Project, where he served as project director. Aydt graduated from the University of Missouri-Rolla with a bachelor's degree in mechanical engineering. He will remain in Findlay.

"We are fortunate to be able to tap Tim's comprehensive experience to run the pipeline operation," Templin said. "We anticipate his leadership will contribute to the value-enhancing growth we are pursuing in our pipeline system."



MPLX is a diversified, growth-oriented master limited partnership formed in 2012 by Marathon Petroleum Corporation to own, operate, develop and acquire midstream energy infrastructure assets. We are engaged in the gathering, processing and transportation of natural gas; the gathering, transportation, fractionation, storage and marketing of NGLs; and the transportation and storage of crude oil and refined petroleum products. Headquartered in Findlay, Ohio, MPLX's assets consist of a network of common carrier crude oil and products pipeline assets located in the Midwest and Gulf Coast regions of the United States, an inland marine business, a butane storage cavern located in West Virginia with approximately one million barrels of storage capacity, crude oil and product storage facilities (tank farms) with approximately 4.5 million barrels of available storage capacity, a barge dock facility with approximately 78,000 barrels per day of crude oil and product throughput capacity and gathering and processing assets that include more than 5,500 miles of gas gathering and NGL pipelines, 54 gas processing plants, 13 NGL fractionation facilities and two condensate stabilization facilities.

Investor Relations:
Lisa D. Wilson, 419-421-2071
Doug Wendt, 419-421-2423

Media Relations:
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