By Tim Wharnsby OAKVILLE, Ontario (Reuters) - Jason Day is eager to open defense of his title at this week's Canadian Open, where his triumph last year marked the start of a remarkable run that saw him win his first major title and claim the world number one ranking. When Australian Day arrived at the Glen Abbey layout a year ago he was still stinging from a missed putt that would that would have put him in a four-way tie for a playoff at the British Open and shot at major championship glory. The victory marked the start of a red-hot run by Day, who won four of six events, including the PGA Championship and two of the FedExCup playoff tournaments.
