CBS Radio has cut a program director and several on-air hosts at news station KNX-AM (1070) and oldies station KRTH-FM (101.1) as it seeks to improve ratings.

CBS last week let go of KNX Program Director Andy Ludlum and on-air personality Bob McCormick, who had a short segment on KNX but was better known as the host of “Money 101” on KFWB-AM (980). A producer of that show, Austin Cross, was also let go. KFWB recently switched its format from news-talk to all-sports.

Dan Kearney, market manager for CBS Radio Los Angeles, said the program director shakeup came from a need to reinvigorate KNX’s programming to make it more attractive to younger listeners.

“We need to change the delivery of the news to make it more appealing to younger demographics,” he said.

KNX in August ranked 15th in the Los Angeles radio market, with a 2.7 percent share of all audiences six and older, according to ratings firm Arbitron.

Meanwhile, KRTH cut four weekend on-air personalities last week, according to trade publication All Access. They are Sylvia Aimerito, Dave Randall, Christian Wheel and Bruce Chandler. The station was third in the August ratings, with a 4.9 percent share of audiences age six and older. Kearney was not immediately available to confirm those layoffs.