Its the second oldest event in Canada, dating back to 1912. Past champions include Raymond Floyd (1981), Arnold Palmer (1980), Lee Trevino (1979 and 1983) and Lanny Wadkins (1978).
The prestigious event was first affiliated with the Nationwide Tour two years ago, and was won, fittingly enough, by Canadian Richard Zokol.
Arron Oberholser used a course-record 62 in round three en route to capturing the title a year ago at the DiamondBack Golf Club (par 71, 7,067 yards) outside of Toronto, Ontario.
Oberholser went on to win the Utah Classic and finish second on the 2002 money list to earn his PGA Tour card.
This is the 13th event of the season, and the third time the tour has stepped outside of U.S. boundaries. The first two tournaments were played in Australia and New Zealand, respectively.
This years current money leader, Joe Ogilvie, is absent from Ontario. That will give Zach Johnson a chance to leapfrog Ogilvie, who did the same to him last week in Knoxville, Tenn. Johnson will also have to pass Vaughn Taylor, who won the Knoxville Open to jump to second in earnings. Taylor is in this week's field.
This weeks purse is $450,000, with $81,000 going to the winner.