WRKO-AM (680) has cut loose afternoon radio host Charley Manning because of less than stellar ratings, according to sources. Ex-WTKK-FM (96.9) nighttime host and Herald contributor Michele McPhee will take his place starting Monday. Manning, who replaced Rush Limbaugh on WRKO, has been on the air less than a year in the 1 to 3 p.m. time slot. More to come…. UPDATE: WRKO just sent out this press release: Michele McPhee to Join WRKO Lineup January 13, 2010 (Boston) – Entercom New England announced today that acclaimed media personality and celebrated author Michele McPhee will join the lineup at WRKO...