I do recall seeing one blitz against Tennessee...K. Thomas came in on a blitz and never got anywhere near Young. Nice completion on the play.
When your front four get decent pressure, you're much better off not blitzing. When they don't, sometimes you have to try. They had gotten good pressure the previous couple of weeks with the front four, but nothing against Tennessee. I was a little surprised they didn't blitz more, especially against a rookie QB. Then again, I haven't watched film of the Titans, and it could be that Young does a lot of damage against blitzing teams by using his legs.