Goofy Trivia Question: Fewest Pars by Champ

Here's a strange (but I think intriguing) trivia question for everyone to ponder (and perhaps research):

What is the fewest number of pars carded by a professional golfer en route to a championship in a 72-hole PGA event?

Obviously, when a golfer posts a very low score he will have a lot more birdies than pars on his card --- e.g., David Duval had only 6 pars when shooting his famed 59). But golfers can often have quality roller-coaster rounds with even fewer pars --- e.g., Fred Couples had only 5 pars when shooting 69 in round 2 of last week's Memorial.

Without doing any serious research, I'd bet someone has won a PGA event with only about 20 pars. Other thoughts?