Pádraig Harrington was left to rue a couple of bogeys on the back nine as his Shaw Charity Classic challenge came up just short in Canada.
Harrington was forced to settle for a share of third place on eight-under-par, one shot outside the playoff which was won by Jerry Kelly after a four-under 66.
Needing a fast start to get back into contention, the three-time major winner turned in 32 after birdies on the 4th, 6th and 9th.
Birdies on the tenth and eleventh made it three gains on the spin and took him into the lead on his own on nine-under.
It might have been better for Harrington had his 15-foot eagle putt on 11 not turned its nose up at the hole.
The 50-year-old relinquished his lead and soon became the hunter again after back-to-back bogeys on 12 and 13.
The US Senior Open champion reignited his challenge with a much-needed birdie on 15 but he was unable to find the crucial birdie in the last three holes and closed with a disappointing par on the par-5 18th having eagled and birdied it in his opening two rounds.
While the AIG Women’s Open went to a four-hole playoff in Muirfield this decider was short and sweet with Jerry Kelly seeing off John Huston with a birdie on the first extra hole, the 18th.
Both players were locked together on nine-under with Kelly posting a three-under 67 and Huston roaring up the leaderboard with a five-under 65, one ahead of Harrington, Dean Wilson, Alex Cejka, Joe Durant and overnight leader Kirk Triplett.
Having only decided to tee it up in the Great White North as part of a family holiday, Harrington has posted his third top-3 finish in succession which included his win at the US Senior Open and runner-up finish to Darren Clarke in the Senior Open Championship.
Overall, it is the Dubliner’s sixth top-10 on the Champions Tour leaving him second in the season long Charles Schwab Cup standings.