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St. Louis, MO (Sports Network) - Kohki Idoki came from relative obscurity, and five shots back, to win the Senior PGA Championship by two strokes on Sunday.

Idoki, making just his second career Champions Tour start, fired a 6-under 65 at Bellerive Country Club, supplanted overnight-leader Kenny Perry, and secured his first-ever major championship victory.

The 51-year-old Japan native, who went ahead for good with a lengthy birdie putt on the 17th, ended at 11-under-par 273, two strokes clear of Perry (72) and Jay Haas (70).

Perry was seeking his third career victory and first major title on the Champions Tour. He led by three strokes for much of the final round, but stumbled to a double-bogey 5 on No. 13, which allowed Idoki to pull even, and later fell from contention with back-to-back bogeys from the 16th.

Mark O'Meara (65) jumped 11 spots into a solo fourth finish at 8-under, Kiyoshi Murota (67) took fifth at 7-under, and Jim Rutledge (64), Kirk Triplett (68), Duffy Waldorf (69), Russ Cochran (72) and Rod Spittle (71) tied for sixth at minus-6.

More to follow.