MSU's plan was to load the box to stop Henry, which makes you have to play man on the outside. Which is fine if you have the corners to do it. Even now that Coker is proving he can beat them with his arm, they're still putting 9 guys in the box. They just can't match up man-to-man with Ridley.
On the other side, Alabama is getting tons of pressure with just a 4 man rush. Cook just has nowhere to go.