Warren Moon has a message for Donovan McNabb ... you WILL be a Hall of Famer -- so stop campaigning for it!!!
D-Mac stirred up the football world just a few months ago when he told the guys on the "TMZ Sports" TV show (airing weeknights on FS1) that he belongs in Canton.
Moon saw the interview ... and wishes McNabb had been a little more neutral on his stance -- saying there's ZERO need for D-Mac to plead his case.