Wiki might be missing a few, but long story short, there are almost no successful diabetic athletes in the history of professional sports:
http://en.wikipedia.org/wiki/List_of_sportspeople_with_diabetes
Jay Cutler
Ron Santo
Jackie Robinson (Type 2, not sure if he had this during this playing days, likely not)
Bobby Clarke
And that's about it. The odds are clearly stacked against Morrow. Diabetes is not some minor thing.