MPLX LP Appoints Tom Kaczynski as Vice President of Finance and Treasurer

FINDLAY, Ohio, Aug. 21, 2015 - MPLX LP (NYSE: MPLX) today announced the appointment of Tom Kaczynski to the position of vice president of finance and treasurer, effective Aug. 31. Kaczynski will report to Tim Griffith, MPLX vice president and chief financial officer.

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About MPLX LP

MPLX is a fee-based, growth-oriented master limited partnership formed in 2012 by Marathon Petroleum Corporation to own, operate, develop and acquire pipelines and other midstream assets related to the transportation and storage of crude oil, refined products and other hydrocarbon-based products. Headquartered in Findlay, Ohio, MPLX's assets consist of a 99.5 percent equity interest in a network of common carrier crude oil and products pipeline assets located in the Midwest and Gulf Coast regions of the United States and a 100 percent interest in a butane storage cavern located in West Virginia, with approximately 1 million barrels of Natural Gas liquids storage capacity.

Investor Relations Contacts:
Geri Ewing (419) 421-2071
Teresa Homan (419) 421-2965

Media Contacts:
Chuck Rice (419) 421-2521
Jamal Kheiry (419) 421-3312