collins:
http://www.nfl.com/players/playerpage/1013
ferotte:
http://www.nfl.com/players/playerpage/1070
ferotte throws a few less INTs per TD, but collins puts up LOTS more yards... its not like he had the greatest WR cast in NY, and he isn't a career backup either.
your point is somewhat supported by the time collins has been on the FA market without interest though. I don't think his arm was strong enough to max out on randy last year :/