In a game that ended 44-41, it would be misleading to think the defense gave up 44 points. It was responsible for 23.
The Lions gave up 378 yards in the air, but two plays accounted for 132 of those yards and the two touchdowns.
They held the Titans to three field goals on five attempts. They held Chris Johnson to 24 yards on 14 carries.
The pass rush wasn't effective due to the short passing game the Titans employed.
While it wasn't effective in getting to Jake Locker, besides the two big plays, the defense kept the Titans in front of them and played an effective "bend but don't break" philosophy.
The Lions defense definitely could have played better, but it wasn't responsible for this loss.
It wasn't responsible for other 21 points.
Detroit was unruly and undisciplined, but it did show up.