John Mahaffey
Wins: 0
Top 10s: 1
Years Played: 1974 - 1990
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| 1990 | T42 | |||
| 1989 | ||||
| 1988 | ||||
| 1987 | T35 | |||
| 1986 | T42 | |||
| 1985 | T14 | |||
| 1984 | MC | |||
| 1983 | T40 | |||
| 1982 | MC | |||
| 1981 | T8 | |||
| 1980 | T44 | |||
| 1979 | ||||
| 1978 | ||||
| 1977 | ||||
| 1976 | T39 | |||
| 1975 | MC | |||
| 1974 | MC |