"What are the chances that someone actually defends their title when they're not Tiger Woods?"

Reader Tim took exception to something Ben Crane said this week about defending at Torrey Pines. From a BBC posted item:

The defending champion is Ben Crane and asked about his own prospects of recording back-to-back wins at Torrey Pines, he replied: "I'm thinking about it casually here, but I'm not really expecting a lot this week.

"What are the chances that someone actually defends their title when they're not Tiger Woods? It doesn't happen very often."

On the European Tour this season alone there have been three defending champs pulling off a repeat: Pablo Martin, Charl Schwartzel, Martin Kaymer.