I've had it happen where WLOS/13 in Asheville carries a ACC game, but WMYA/40 carries a ABC Sports show(produced by ESPN). Has it happened before in your area?
This has gone ion for years in many markets. At one point in the early '90s, when San Francisco's KRON was the NBC affiliate, the station often pre-empted NBC sports events, which were picked up by the aforementioned KOFY TV 20. That station ran a few NBA games, and a couple of golf tournaments, when KRON's pogram director at the time was complaining that NBC's sports schedule was too 'inconsistent' and the station wanted mor 'long-term stability'. Eventually, they backed off on weekend sports pre-emptions, and ceded the Saturday-morning children's shows to KOFY.
For years, WFSB-TV (CBS) channel 3 of Hartford carried the Jerry Lewis MDA Telethon. One year, the CBS Sports coverage of US Open Tennis ended up on WCTX-TV (MY) channel 59 of New Haven. More recently, regional FOX Sports coverage of Major League Baseball would have one game on WTIC-TV (FOX) channel 61 of Hartford (such as the Yankees), with a different game on sister station WCCT-TV (CW) channel 20 of Waterbury (the Red Sox or Mets).
Back in its WJRJ days, Atlanta's channel 17 (now WPCH) carried AFL Sunday football games that then-NBC affiliate WSB/channel 2 passed up. They carried the odd Saturday college tilt from ABC as well. In 1980, WGNX/channel 46 (now CBS outlet WGCL) carried college basketball games passed up by WAGA/channel 5 (the original CBS affiliate here).