Really cant see logic of keeping Andersson over ferraro.
Both have hands of stone, Anderssson is a decent faceoff man I guess but Ferraro is fast and seemed to play a fair bit more physical.
The logic was probably that Ferraro would get to play in Grand Rapids but Andersson or Miller would not.
You're only allowed to have 6 veterans playing in the AHL at a time and the Griffins already have Paetsch, Lashoff, Hoggan, Cleary, Miele, Tangradi, Grant, and Rechlicz. Adding another veteran like Andersson would have just made for less ice-time for all the veterans.