Thats stinks when the back flares up. It has been an issue for me in the past. I'd like to see he and Tiger go at it again on Sunday.
I heard an interview with Paddy and he said the back was not an issue in the last two rounds. He is a very confident and optimistic individual. After a poor final round, he just said it happens and said he wouldn't let it bother him. That's would be a tough thing to do, go from contending after the third round, to falling out on the last day. Didn't have the best final round but I give him the golf for most positive attitude.