The caddie for American Marco Dawson was taken to hospital on Tuesday after being hit on the head by an errant shot during a practice round for the Open Championship.
William Ciplinski was stood beside the green on the eighth hole at Royal Troon when he was hit by a ball struck from the seventh tee by three-time major winner Vijay Singh.
Tournament officials said Ciplinski was taken to a local hospital for overnight observation but was said to be talking and fully conscious after initially being taken to the on-site medical centre.
Dawson, 52, played more than 400 events on the PGA Tour without a win but qualified for the Open with victory in the Senior British Open at Sunningdale last year.
A spokesperson for NHS Ayrshire and Arran told Press Association Sport that Mr Ciplinski was in a stable condition after being taken to University Hospital, Ayr.
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Press Association Sport