Did we really play prevent on Bama's last drive?

LINK Start of Bama's last drive.

1st play. We show blitz before the snap and rush 4. We play tight coverage, McCarron makes a good throw and they pick up a 1st down.

2nd play. Again, we rush 4 and play tight coverage. McCarron makes a good throw and the WR makes an unbelievable catch.

3rd play. We rush 5. We do play a softer coverage on this play. We have 1 deep safety, and 3 dbs drop back about 10 yards. Still, Bama ran the perfect call to counter our defense. They flooded Mills' zone with a crossing route and McCarron made a nice throw to the guy Mills didn't cover.

4th play. We rush 4. We play tight coverage and we actually have Minter playing the RB. McCarron throws to the back of the end zone where the DB and WR get tangled up and fall down.

5th play. We blitz 4 or 5. I'm not sure if Minter was blitzing and he read screen too late, or if he just messed up picking up the RB out of the backfield. We all know what happened after the RB caught the ball.

We rushed at least 4 guys every play. We played tight coverage on at least 3 plays. Only 1 play, when we blitzed 5, did we play a softer coverage. People just need to give Bama credit. They made some great calls, McCarron made some great throws and their WRs made some great catches. What we played was not a prevent defense. At least not in the traditional sense.