WGN produces 45 Cubs games this year for regular season broadcast, which are aired throughout the midwest on various OTA stations.
Each station will be facing decisions like this, whether to place on a substation, the primary, or a mix of both.
The example above shows WAND expects better ratings on Cubs games than NBC programming, which over the summer may be the case.
Many are on MyNet which easily can skip default network programming.
Here is a link to the WGN produced games:
http://wgntvsales.com/Sports/Cubs_Schedule.pdf
This is the OTA stations originally planned to carry CUBS OTA:
*Games also airing on the following WGN Cubs local TV station affiliates...
WNDY 23.1 (MyNetworkTV) or WISH 8.1 (The CW) Indianapolis
KCWI 23.1 (The CW) or WOI 5.1 (ABC) Des Moines – Ames (32 games)
WAND 17.2 (Cozi TV) or 17.1 (NBC) or WBUI 23.1 (The CW) Champaign & Springfield – Decatur (34 games)
KCRG 9.2 (MyNetworkTV) or 9.3 (Antenna TV) or 9.1 (ABC) Cedar Rapids – Waterloo – Iowa City & Dubuque
WMYS 69.1 (MyNetworkTV) South Bend – Elkhart
WQAD 8.3 (MyNetworkTV) Davenport – Rock Island – Moline
WISE 33.2 (MyNetworkTV) Fort Wayne (38 games)
WAOE 59.1 (MyNetworkTV) Peoria – Bloomington
WIFR 23.2 (Antenna TV) Rockford
WGEM 10.2 (The CW) or 10.3 (Fox) Quincy – Hannibal – Keokuk (Five games)