Two weeks later:
Sam is doing very well. He's up to 15 lb 3 oz now. (6888 g)
He got his stitches out today--it was very traumatic experience for Sam. All's well that ends well though. Here is a picture from this evening. (click to enlarge.). He still has some faint bruising and now that the stitches are out of his belly, those spots will start to heal better (and lose their redness). He's gobbling up solid food now (the usual starter baby food stuff)