Harvey,
WGN and WBBM are both 50k and whatever remains of clear chanels and, 
I believe, omnidirectional nighttime patterns, so there shouldn't be 
a lot of difference to listeners.
Pat, K9JAUAt 08:30 PM 3/4/2015, you wrote:
>I think it is a decision the Cubs will ultimately regret.  The Astros made
>the same mistake in the early 80's when they went to what was then 1070
>KENR.  Their nighttime direction pattern was so narrow that they hardly got
>out at all, and they had to put the nighttime games on their FM rock station
>KRBE which made that staff and audience very unhappy.  They only remained
>with them for one contract before returning to KPRC, but they are now on
>KTRH.  I think the same thing will happen with the Cubs.
>Harvey
>
>-----Original Message-----
>From: For blind ham radio operators [mailto:[log in to unmask]]
>On Behalf Of Pat Byrne
>Sent: Wednesday, March 4, 2015 7:49 PM
>To: [log in to unmask]
>Subject: Re: Why do I do this?
>
>Something I read said that the Cubs were looking for more money than
>WGN was willing to spend and WBBM bought in to it.  Cubs on A M -
>news on F M.  So on nights when I need the news to put me to sleep
>and the Cubs are on the West Coast, it's  F M for me.  The Cubs
>should make me sleepy but just piss me off!
>Pat, K9JAU