The Ace was only the fifth on the hole in tournament history and the first of McCarthy’s PGA Tour career.
And then, just hours later, Brendan Todd also rolled in his first hole-in-one of his PGA Tour career.
The American completed the feat on the par-3 eighth with a 213-yard effort with his 5-wood. It was the first hole-in-one on the eighth since Michael Thompson’s ace on the opening round of the 2013 game.
For McCarthy, who had two hole-in-ones but none that competed, the ace was the culmination of an outstanding round that put him into battle at the PGA Tour flagship event.
“I just had a really good number on that pin today. It was a perfect 8 iron for me, and I just stepped forward and executed the shot.
He came in this week after missing six of his last eight cuts, but his second round of 69 and a total of 6 under has him among the leaders.
Lee Westwood hit a bogey-free 6-under 66 and came halfway through with a score of 9 under on Friday, ahead of fellow countryman Matt Fitzpatrick.
While the odds of professional golfers hitting a hole-in-one are significantly higher than the average player, they can still go their entire career without a hole-in-one.
The odds of a tour player hitting a hole-in-one are 3,000 to 1, while for average players they are 12,000 to 1, according to the National Hole-in-One Registry.