MPLX LP Commences Exchange Offers and MarkWest Energy Partners, L.P. Commences Consent Solicitations

FINDLAY, Ohio, and DENVER, Nov. 19, 2015 - MPLX LP (NYSE: MPLX) and MarkWest Energy Partners, L.P. (NYSE: MWE) (MarkWest) today announced that, in connection with the anticipated combination of MPLX and MarkWest, MPLX has commenced offers to exchange (each an "Exchange Offer" and collectively, the "Exchange Offers") any and all...