Rory McIlroy is the defending champion from the last event in 2019.
Shane Lowry is one of the early starters today in Toronto as the Canadian Open returns to the PGA Tour for the first time since 2019.
The Clara man will play alongside Brandt Snedeker and Matt Fitzpatrick for the first two rounds, and starts just before 12.30pm Irish time today.
Rory McIlroy, the defending champion, tees off shortly after midday beside Justin Thomas and Corey Conners.
Meanwhile, the controversial Saudi-backed LIV Golf series gets underway in the UK later.
Phil Mickelson's among the star names in action at the Centurion Club near London, where there's a prize pot of £16m in the individual competition.
The Saudi-regime's been accused of using it as a form of 'sports washing', and former world number one Dustin Johnson's among the players who've turned their back on the established PGA Tour to focus on the new series.
Elsewhere, Ulster duo Jonathan Caldwell and Olivia Mehaffey are involved in the Volvo Scandinavian Mixed event, which gets underway in Halmstad today.
Third Time The Charm As Laois Claim Joe McDonagh Cup
Offaly Pupils Become Local Stars After Publishing Bestselling Book
Katie Taylor To Fight At Croke Park In September
Laois And Westmeath Set For Big Tests In Intermediate Camogie Championship
I Knew I Had To Play A Good Round To Win - Ella Cantwell
Mullingar Athletic And Clonaslee United To Clash In Combined Counties Cup Final
Shane Lowry And Rory McIlroy In Contention At Memorial Tournament
There's Serious Competition In The Laois Panel - Mark Dowling
Westmeath Ladies Look To Book All-Ireland Quarter-Final Spot
Alex Dunne Aiming For Big Weekend In Monaco
Offaly Camogie Captain Looking Forward To Kilkenny Clash
Shane Lowry In Action At Memorial Tournament
Laois Aiming To Make It Third Time Lucky In Joe McDonagh Cup Decider
Galway To Host Westmeath On Sunday June 14th
Second Round Draw Made For FAI Cup
Cian Reddy Keeps Up Unbeaten Professional Record
Westmeath Ladies Get Opening Win In All-Ireland Intermediate Championship
Athlone Town Knocked Out Of All-Island Cup
Limerick See Off Offaly In Senior Camogie Championship
Athlone Town Suffer Defeat Away To UCD In First Division