The Tribune Co. has boosted four execs: Patrick J. Mullen to prexy, Tribune Television; Michael Eigner to prexy, Tribune Cable; Peter S. Walker to senior VP, Tribune Television; and John E. Reardon to West Coast regional veep.Mullen, formerly regional VP, will oversee the company’s 22 TV stations and will directly manage WGN in Chicago; WXIN, Indianapolis; and WXMI, Grand Rapids, Mich. He replaces Eigner in the post. Eigner will oversee WGN Cable as well as the company’s interests in the TV Food Network and the Golf Channel. Walker will oversee the western and southern regions of the company’s television group. Reardon will manage stations KCPQ/KTWB, Seattle; KTLA, Los Angeles; KTXL, Sacramento; and KSWB, San Diego.