Salem wanted their signature Christian "Word" format to be on what they believed to be their strongest signal.The original switch of WKNR to 850 was always baffling to me. Yeah you can pick up 850 during the day in Columbus but was it really that much better of a signal to have than 1220? 850 at night is dreadful.
Remember, sports wasn't/isn't really a format in Salem's wheelhouse, and WKNR was the proverbial exception to the rule.