A lot of people here have talked about how much it bothers them that we run into those 8 man boxes! Here I'll show how we can run the ball against a 9 man box as long as Kaep makes his proper pre-snap read.
Before the snap, Kaep saw the LB creep to blitz with the safety moving down into the box showing a 9 man box. He checked the play(presumably to run the opposite way). He checks to an off tackle power play. This will leave the man end man on the backside unblocked as they'll be unable to make a play anyways. Because Tampa had shown a lot of slants off of this play, he see's they will play right into the power run as the 1 technique will slant across the C face allowing the C to block the backside LB and McCoy slanting across Davis' face, giving Davis a good angle to kick him out.
You see at the snap how the blocking assignments play out, Miller is on an option block(If Davis keeps his man Miller leads into the hole, if Davis releases up to the 2nd level Miller takes the 3 technique.
Davis does release up to the 2nd level and Miller takes the 3 technique(McCoy), Snyder comes around on his power lead and sets up blocks on the LB
Snyder and Davis do a great job of sealing off the LB leaving opening a lane for Frank to be 1-1 with the safety.
Frank Gore makes a little move and is able to pick up 10 yards on the play. That is a 10 yard run against a 9 man box. That isn't supposed to happen. That's great play design, great pre-snap recognition and great execution.
If you can run the ball for 10 yards against a 9 man front, that will completely demoralize the opposing defense.