Additionally, Jonas Gustavsson has been placed on IR, and David Pastrnak appears to be on the roster as well.
From the Bruins site:
Oh look, there they are - Pasta and Subban.
It's worth noting that as of earlier this morning, Gustavsson wasn't listed as being on IR, nor were Subban and Pastrnak mentioned, according to a cached version of the roster page.
The Bruins face Toronto tomorrow at TD Garden. As there's been no real updates on Jonas, I think we can safely assume that this Subban callup is probably legit. And this time, he PROBABLY won't be chucked to the wolves against the best team in the league!