There are a few , but this is at the top of the list.
He does not get hurt. He never gets hurt.
As ALL other teams QB's have gone down the last 3 years, BLM has been injury free.
This will continue and he will not get hurt.
Then the O-Line. They give BLM all the time in the world.
Further, BLM has an amazing fast release. One of the fastest I have seen.
No time for the D to react or catch him.