The Clara man will tee it up with the world's best at Jack Nicklaus's tournament.
Shane Lowry has an evening tee-time as the Memorial Tournament gets underway on the PGA Tour later today.
The Clara man will start his first round in Dublin, Ohio, alongside Jon Rahm and Bryson DeChambeau just before 6pm Irish time.
Rory McIlroy will get underway shortly afterwards, while Waterford's Seamus Power has a lunchtime start.
Meanwhile, Leona Maguire and Stephanie Meadow begin their bid for major glory later.
The Irish pair are in the field for the US Women's Open in North Carolina.
Both players tee off this evening.