Shane Lowry and Rory McIlroy laughed together at dinner Tuesday night, about 18 hours before their scheduled first-round WGC-Accenture Match Play Championship contest.

Lowry had the ribs at Lil Abner’s Steak House.

He and his childhood friend — who happened to also be the world’s No. 1 golfer — cheered together when, at their table of nine, two caddies lost Credit Card Roulette and had to pick up the tab.

“It’s only a game of golf,” Lowry said. “It’s not life or death. We’re not going into battle.”

One day and a snow cancellation later, the vibe between the two changed during Lowry’s 1-up upset of the tournament’s top seed Thursday at the Golf Club at Dove Mountain.

Their chummy chatter wore off after a few holes.

Read more about the Irish golfers in Friday's Arizona Daily Star.