Former Fox 25 morning show anchor Kim Carrigan was mum yesterday on the buzz that she’s joining WRKO radio’s morning-drive show following the exit of talkmeister Tom Finneran — who is leaving the station tomorrow after a lackluster five-year run. “It’s no secret that I’ve filled in a few times and that’s been a ton of fun, but outside of that I don’t have any comment at this point,” Carrigan told the Herald. “It’s fun,” she said of being on the radio. “It’s awesome. It’s so different, but it’s so fun.” Carrigan — who left Fox 25 in January after...