Flo comes from the BB tree. BB has shown many times over the years he likes to protect the vets with certain "injury" designations to give them rest from time to time.
It seems Flo also tends to manage his vets and rewards players with precautionary rest.
Remember, this is gonna be a 17 game grind. It may only be one more game, but when most players are conditioned for 16 it can become a very important element of player management to know when to hit the gas and when to hit the brakes.
I don't worry too much about "minor injuries". Most are just excuses to help prevent real injuries.