I usually get my info from
http://www.forums.mlb.com/ml-bluejays
There's not a lot of different posters, and it can be a bit childish at times, but there's a lot of inside info there.
Usually things get posted on there a couple days before it gets around on the net, like Musgrove signing for 500K. Sort of like here on CP with Sureloss and all the others.