As expected, the Chicago Sports Network and DirecTV formally announced an agreement Wednesday to carry the new TV home of the White Sox, Bulls and Blackhawks when it launches Oct. 1. The first pay-TV partner for the nascent 24/7 regional sports network will air 300-plus games and additional sports programming for DirecTV subscribers across a five-state footprint, including Illinois, Iowa and portions of Indiana, Wisconsin and Michigan, filling in a part of the viewing puzzle for fans of the three teams. “We have always prided ourselves on being a sports leader and intend to remain at the forefront,” Rob Thun, chief content officer for DirecTV, said in a news release. The Chicago Sports Network will replace NBC Sports Chicago in the DirecTV channel lineup on Oct.