I'm playing Goblins in single player just to get a feel for them. It appears that when my Fanatic inflicts a casualty during a block triggered by his move action, he does not earn any SPP. However, I was playing against another Goblin team. Their Fanatic blocked my Fanatic, resulting in a Both Down. Their Fanatic was injured, and my Fanatic earned SPP. My understanding is that both situations should have led to SPP being awarded.