Only one player in the history of the RBC Canadian Open has successfully defended his title -- Jim Furyk in 2007. Scott Piercy will begin his quest this afternoon.
He joins a host of other big names teeing it up in the afternoon wave. Here's a closer look at who and what to watch for (all times ET).
Scott Piercy, 12:45 p.m.: Last year's winner has struggled of late, missing his last three cuts and five of his last eight, which including a stunning 88 in the second round of The Open Championship. But he's played well in this even the last two years.
Ernie Els, 12:45 p.m.: Conversely, Els comes in playing well with four finishes in the top six in his last eight worldwide starts.
Luke Donald, 12:45 p.m.: Coming off a missed cut at The Open Championship has played pretty well otherwise with six straight top 25s. He's also finished in the top 25 in all three previous appearances in the Canadian Open.
Graeme McDowell, 12:55 p.m.: The Northern Irishman has missed the cut in two of his last three starts on the PGA TOUR, but he won the other RBC event earlier this year, beating Webb Simpson in a playoff at Hilton Head in April.
Jim Furyk, 12:55 p.m.: The 2007 champion, Furyk comes into the week trying to turn things around after missing two of his last three cuts, shooting a combined 28 over during that stretch.
Mike Weir, 1:05 p.m.: No Canadian has won this event since 1954. Can Weir end the drought? History says no. Weir has missed 11 of 19 cuts and hasn't made it to the weekend in this event since 2009, which also happens to be the last time the tournament was played at Glen Abbey. He finished 24th that year.