Vancouver Canucks have retired 2 numbers now. Wasn't there another number the Vancouver Club didn't use?

Yup, it's #11.

The number 11 of Wayne Maki (LW, 1970-73) was unofficially retired by the team following his untimely death in May 1974. (Maki died of brain cancer. He was 29.)

The number has only been used by 2 players since, Messier was one of them.

only 2 #s thats embarrassing..to only have 2 great players in their entire franchise worthy of retiring their #s,,here in Boston. the best damn sports city in all of North america,,(Cetics, Red Sox and Patriots) all ur players have to wear high #s..we have #2,3,4,5,7,8,9,15,24,77,all retired ,the hell with 99 he couldnt carry Bobby Orrs skates..
Bruins 2008-2009 stanley cup champs

The number 99 Is retired league wide so no canuck can use it.
And out of respect I don't think the number 28 will be worn for a while for Luc Bourdon but it isn't actually retired.