Denny McCarthy and Hideki Matsuyama share the lead at St. Jude

Denny McCarthy made 160 feet of putts on his way to a 7-under-par 63 that rocketed him into a tie for the second-round lead with Hideki Matsuyama of Japan at the FedEx St. Jude Championship, on a day when the Irish contingent lost ground.

In the first leg of the FedEx Cup playoffs at TPC Southwind, McCarthy and Matsuyama (64) stand at 11-under 129, one stroke ahead of Sam Burns (63) and two in front of Scottie Scheffler (65).

Justin Rose carded a second straight 66 to sit in a tie for fifth at 8 under with Nick Dunlap (65).

Rory McIlroy had a day to forget, carding a round of 73 with three bogeys and a double bogey as he finished the day on +3 for the tournament.

Seamus Power's round of 70 saw him slide down the leaderboard to -3, while Shane Lowry is a shot behind on -2 after signing for a 68.

McCarthy is known as one of the best putters on tour, but so far that has not translated into any victories. He could become the third player to make a play-off event his maiden PGA Tour title, following Camilo Villegas (2008) and Will Zalatoris (2022).

McCarthy's highlight birdie putts included a 26-footer for birdie at the par-3 fourth hole; a 28 1/2-footer at the par-3 eighth; and a 32-footer at the par-413th.

"Listen, I've missed a couple of short ones, too. I think these greens are really tricky in close," McCarthy said. "They're really subtle with the grain, hard to find the slope... So I've missed a couple ones I'd like to have back, but they probably all even out with some of the longer ones I make.

"I'm just trying to put, like I said, the same amount of intention and focus on each putt, whether it's short or long, trying to make it but not trying to ram it 8 feet by."

McCarthy has been dealing with a labrum injury in his hip.

"It'