It was after a year of recovery (usually takes 2 years to recovery from Tommy John) and he wasn't right that entire year. That's the reason he was originally moved to the bullpen. I realize Beckett was hurt last year, but Smoltz has over 200 postseason innings. I think it's safe to say that he's pitched hurt as well.
Not that it matters all that much, they're both on our team and if they're healthy they'll be starting for us in the postseason.