I think this is a false report, he released a statement on Twitter yesterday that said he did not faint or pass out at practice.
Best wishes for a speedy recovery for this future Tiger. Dehydration is very dangerous and can quickly turn fatal. Very easy to get dehydrated in this heat ! Stay cool my friends.
Right, I corrected it, what I saw looked like it had come from Guice but it actually hadn't so I retract my previous statement.