That is true and it is pure speculation that he actually tore the muscle. However, if he really did tear it, calling it a "moderate strain" is not incorrect. It sounds better than saying he tore it, but it can mean the same thing. Right its just a different way to not say tear, which would stike fear into the fans. Very possible. In either case, the word tear doesn't necessarily mean there is a serious problem. Weight lifters "tear" their muscles, everytime they workout inorder to make them larger.