Wasn't he also an assistant coach under Wilson? I could be mistaken.
Re-checking his hockeydb.com entry (
http://www.hockeydb.com/ihdb/stats/pdisplay.php?pid=2133) he was head coach at AHL Portland for Wilson's last three seasons then was a Cassidy assistant till the Napkin Man was sacked. (Just got too much of that career ladder on my brain right now, for some reason.)