I don't understand why everyone is scared of Josh running. You are historically more at risk to injury as a QB in the pocket.
1) in the pocket you get hit blindsided
2) you have a defender running full speed at you while you are standing often not bracing yourself
3) your foot is planted making ligament damage more common.
When you are running you generally see whats coming, he may get hit in the head for a concussion or maybe some bruised ribs or something, but in general running QBs don't get injured more than qbs that stay in the pocket.