John Doe
Pay to the order of ABC LLC
Then it would be endorsed by the LLC. I cannot think of a sinister reason for doing this (that's kind of odd for me). However, if I did a job for someone and they unknowingly made the check payable to me rather than my LLC, the other members would expect me to endorse it over to the LLC as is being done here.
_________________________
In this world you must be oh so smart or oh so pleasant. Well, for years I was smart. I recommend pleasant.