The worst case scenario for anyone who has both C-Mart AND Blaylock owuld be this: Herm Edwards, in his undertsandable loyalty to the man/myth/legend that is Curtis Martin pounds him up the middle 20+ times per game, even though he's inneffectual because of a bad knee. Blaylock might get 10 carries, but not enough to either win the full-time starting job or distinguish himself as far as fantasy value goes.
I can see it happening. Martin is a stud, but 2002 and 2003 were tough years for him, despite being two 1000-yard seasons. He had 9 TDs in two years. In '04, while healthy, he had 14.
During 2002, where C-Mart had the fewest carries of his career, LaMont Jordan had but one game that could be considered of real fantasy value: 107 rushing yards and a TD.
For two seasons, the Jets RB situation failed to produce much fantasy value. If C-Mart is moderately injured, I'm afraid that could happen this year.
This is exactly why C-Mart fell so far in drafts. Not that he wasn't worth a risk when you cinsider how low he went in some.