Walsh, who also won the race at Aintree in 2005 with Hedgehunter, was 20 at the time.
"It's sad news but he gave me the greatest day of my racing life when he won the Grand National with Ruby on in 2000. That's 17 years ago now but it doesn't seem that long ago," Walsh's trainer and father Ted told racinguk.com.
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(Reporting by Alan Baldwin, editing by Larry King)
