'It was a great day,' said Jenkins, who pocketed $210,000 for the win. 'It's hard to explain how these things happen especially when you're playing with two of the best players on the Champions Tour.'
Hale Irwin, who led after the first two rounds, struggled to a 1-over 73 and shared third place with Jim Colbert, who posted a 3-under 69 in Sunday's final round at Greystone Golf and Country Club. The duo finished at minus-11 as Irwin remains winless in 2003.
'It was just one of those days that, if I hit it close, I missed the putt,' Irwin said. 'Tom played spectacularly. I just never seemed to get my feet under me.'
Jenkins broke into red figures quickly with a pair of birdies at two and three but the 55-year-old dropped a shot at the par-3 fourth. Jenkins closed his front nine with birdies at six and nine to make the turn at 3-under 33.
Jenkins birdied 11 and 14 to reach 16-under par-but it was Irwin's play down the stretch that sent Jenkins atop the leaderboard. Irwin birdied 12 to stay near first but he bogeyed 13 and 14 to fall down the leaderboard.
Irwin birdied 12 but bogeyed 13 and 14 after playing even-par golf until that point.
'I seemed to be left-footing myself all day,' said Irwin, who won this event in 2001. 'Nothing against left-footers, but I'm right-footed.'
Fleisher drained a 15-foot birdie putt at the 13th to match Jenkins at 15-under par. Jenkins knocked an 8-iron to two feet to set up birdie at the 14th to go ahead by one but Fleisher had the best chance of keeping things interesting with Jenkins.
Fleisher, down one to Jenkins, missed a sliding five-footer for par at the 15th to fall two back but Fleisher still had a chance as the 18th at Greystone is a par-5.
Fleisher hit a poor drive at the 18th hole and never recovered. He bogeyed the hole and Jenkins parred out to take the title.
'The better man won today,' said Fleisher. 'I made quite a few mistakes today. You learn from your mistakes and hopefully I will. Tom played very well today, he really did. He's an excellent player from 100 yards in. That's his strength.'
Jenkins became the 10th different winner in 10 events on the Champions Tour in 2003 and also the 12th different champion of the Bruno's Memorial Classic in its 12-year history.
Jenkins won for the fourth time since joining the Champions Tour in 1998 and the title was his first since last year's Canada Senior Open Championship, a tournament he also captured in 2000.
'Words can't describe the feeling of winning,' said Jenkins. 'To go head to head with those guys and win -- it's a nice feeling. We have a lot of great players out here and it's going to get better and better.'
Rodger Davis came in fifth at 10-under par, followed by Graham Marsh (69), Bruce Summerhays (68), John Jacobs (70) and Bob Gilder (72), who shared sixth place at 9-under-par 207.