Not certain but John Lockhart (Illinois), 285lb. champ in 2001, has to be in contention...at least for lowest point differential anyway. Watching his crawl to the title was like watching paint dry . Not to mention the fact that many of his "points" were awarded after the match for winning the tiebreaker.
RD1 - John Lockhart 5-4 TB
RD2 - John Lockhart 4-2 OT
Quarters - John Lockhart 3-2
Semis - John Lockhart 2-1 TB
Finals - John Lockhart 2-1 TB