I seem to remember that their knee injury rates aren't that alarming, but can't say for sure. Just remember some trainers saying their knees aren't that bad off, all things considering, especially compared to other athletes.
Maybe The Coach knows.
No I'm sure you're right.
What do you do specifically for lower back?
We do a variety of moves. GHR, reverse hyper, RDL, 1RDL, keg carries, Kettle Bell swings (as well as other KB exercises), jump band good mornings, etc.