It's one of those injuries where there isn't much news unless it's bad. It's sort of liked cracked ribs. All you can do is not exert yourself and wait. The one bit of good news is, because you're not in a cast or anything, no part of the body suffers from dramatic muscle atrophy, so the body doesn't lose a lot of strength. The biggest dangers are coming back to soon and getting over the pyschological fear that you'll reinjure it if you go 100%.
THe good news is, it's his right obliques, and a righty hitter depends more on his left obliques for his power in a swing.
SInce Pujols is one of my keepers, I naturally read all I can about him, and if anything, the thing that has always worried me about him is his intense training schedule. I sort of wish he'd lay off the weights and work more on flexibility. Whether overtraining had something to do with this injury I don't know. WHat I'm pretty sure though is, he had already strained his oblique to a degree and was trying to play through the minor injury before the play that took him out. Besides the fact that the movements he made on that play shouldn't have casued a serious injury, his at bats in the two games before the injury just didn't look 100% to me.
Maybe this will be a lesson for him than when he feels a twinge, sometimes, it's better to sit a few games rather than play through the pain.
As character flaws in athletes go, working too hard and playing through pain, you can have a lot worse problems than that.