What is the biggest stroke deficit ever overcome to win a golf major?

The record for the biggest 54-hole deficit overcome belongs to Jack Burke, who came back from 8 strokes down in 1956 to win the Masters. He actually fell to nine back before mounting his rally. And in 1978 Gary Player overcome a 8-stroke deficit to mount the second biggest final round comeback in Masters history. In 1996, Nick Faldo famously overcame a 6-stroke deficit to Greg Norman to win, the third biggest final round comeback in Masters history.