From Crains: The tunes, they are a-changin. Radio station New Rock 101.9, which only three months ago was changed from talk radio to alternative rock, is going into sports. CBS Radio announced Monday that it has signed on to purchase 101.9 FM from Chicago-based Merlin Media for $75 million. By late fall, the station will launch a simulcast of Sports Radio 66 WFAN. Its call letters will be changed accordingly. "Sports is a very popular format and a huge growth category for our business," said Dan Mason, CEO and president of CBS Radio, which is owned by CBS Corp., in a statement. "As a result of this new asset, we look forward to The FAN building on its position as the leading sports radio franchise in the country." The purchase, which is subject to regulatory approval, will allow WFAN more reach, as it moves to include an FM dial. 101.9 will be the 127th station operated by CBS in 28 markets nationwide. The all-sports channel, which houses radio personalities including Mike Francesa, Boomer Esiason and Steve Somers, first launched in 1987. It is the flagship station for local teams the New York Giants, New York Mets, Brooklyn Nets and the New Jersey Devils. You wouldn't think they'd go out and spend $75 mil on a radio station (even though that's probably under the couch cushion money for CBS) just for simulcast purposes and it seems to me that they'd opt to keep the sports talk on AM and maybe just simulcast while they search for something more long-term for their new FM property, but what do I know?