I get the idea that when the Jays and the Leafs overlap and the Fan is committed to the former the hockey gets shunted over to 680. But why is the all newser airing the Leafs game 7 on Sunday night? I've heard them promoting the fact they'll be running the finale, but it doesn't make sense in this case. 

The Jays play the Tigers at 1:30 PM Sunday, while the Leafs face off against the Panthers at 7:30 PM. So unless the baseball match goes 6 hours - extremely unlikely - why not just leave it on the Fan and continue the regular format? I'm wondering if the promo was an error, because I haven't heard them refer to it again.

Last week, by the way, 680 also had one of the Leaf games. When the Jays ended on 590, both stations were simulcasting the same thing, which seemed like a real waste. However, I suppose there was no way to cut off 680 mid-game and tell people to tune in the Fan, so the first time I can remember, it aired on both frequencies in the same city at the same time.