I had a fellow who is a star on our DIII football team in class this fall. The work that he turned in was all passing, although often not by much. Yet he was in danger of failing because he didn't turn in so many of the assignments, from daily grades to one major paper.
After discussion with the assistant coach responsible for academic advising, I met with the student. The student agreed that he would turn in all missing assignments, and he agreed to a time frame in which he would complete them.
He didn't turn in a single one. Not one. No call. No email. No excuses (I guess I should be grateful for that?)
I have, on occasion, given non-athletes similar opportunities when they were clearly over committed for a semester. Some have done well and passed; others have done nothing and failed. Even so, this guy really irritated me because he absolutely, positively could have passed if he had just done the @#%& work.
One of these days I'll learn.