Why would the Habs recall Mikhail Grabovski? He isn't part of the team's plans this year. Never heard of that possibility since he was shipped off to Hamilton. But he's being recalled because he needs to be in Montreal tonight, in case he suits up for the visiting team.
If Grabs isn't supposed to suit up and it's totally unecessary to recall a player before trading him, then the idea is to get him to Montreal to either:
a) fill a forward void left by a pending trade
b)become an Atlanta Thrasher
It may also mean that Gainey called Grabovski and left him a message, Grabovski called him back but he wasn't home, and Gainey recalled him. That's possible.