The former world number one suffered a life-threatening car accident 14 months ago and has been recovering from countless surgeries.
The US PGA Championship got up and running on Thursday, with the first group teeing off at 07:00 local time in South Carolina.
McIlroy has not won a major since 2014, however the 2012 and 2014 PGA Championship winner feels good heading into Thursday’s opening round.
Only one player went lower than Rory McIlroy's 66 Friday at the Wells Fargo Championship.
Sergio Garcia set the early pace at TPC Sawgrass, where four-time major champion Rory McIlroy struggled dramatically.
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