I've mentioned many times over time that the Rockford stations carried regionally-syndicated sports packages through the years. WTVO had the Cubs until the end of the 1987 season (they moved to WIFR the next season), while WQRF carried broadcasts of the other Chicago and Milwaukee teams throughout the 80s, as scheduling warranted. WQRF also carried St. Louis Cardinals and Texas Rangers games, starting around the 1988 season (I never understood the Rangers broadcast, other than maybe time filler). Before my time, WREX carried Chicago White Sox games in the '70s, and looking at YouTube videos that a former employee posted, I believe WIFR also carried Brewers games until the early 80s before WQRF got a hold of them. IIRC, WIFR and WQRF split the Big Ten regional broadcasts; one of them carried University of Illinois football/basketball exclusively, while the other had the package of Big Ten games of the week.
My family left for Los Angeles by the summer of 1988, so I don't know how long each of these stations' coverage for the aforementioned team lasted. I do know that the local cable systems added then-SportsChannel Chicago by '87 and WGN had been on cable locally forever, so it made up for the loss for the local channels.