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| First Name | Last Name | Given Name | Birth Year | Birth Month | Birth Day | Birth City | Birth Country | Height | Weight | Age | Bats | Throws |
| Duffy | Dyer | Don Robert | 1945 | 8 | 15 | Dayton | USA | 72 | 187 | -1946 | R | R |
| Year | Team | AB | HR | RBI | BA |
|---|---|---|---|---|---|
| 1968 | New York Mets | 3 | 0 | 0 | 0.3333 |
| 1969 | New York Mets | 74 | 3 | 12 | 0.2568 |
| 1970 | New York Mets | 148 | 2 | 12 | 0.2095 |
| 1971 | New York Mets | 169 | 2 | 18 | 0.2308 |
| 1972 | New York Mets | 325 | 8 | 36 | 0.2308 |
| 1973 | New York Mets | 189 | 1 | 9 | 0.1852 |
| 1974 | New York Mets | 142 | 0 | 10 | 0.2113 |
| 1975 | Pittsburgh Pirates | 132 | 3 | 16 | 0.2273 |
| 1976 | Pittsburgh Pirates | 184 | 3 | 9 | 0.2228 |
| 1977 | Pittsburgh Pirates | 270 | 3 | 19 | 0.2407 |
| 1978 | Pittsburgh Pirates | 175 | 0 | 13 | 0.2114 |
| 1979 | Montreal Expos | 74 | 1 | 8 | 0.2432 |
| 1980 | Detroit Tigers | 108 | 4 | 11 | 0.1852 |
| 1981 | Detroit Tigers | 0 | 0 | 0 | 0.0000 |
| Year | Team | W | L | G | SHO |
|---|---|---|---|---|---|
| 1968 | New York Mets | 0 | 0 | 0 | 0 |
| 1969 | New York Mets | 0 | 0 | 0 | 0 |
| 1970 | New York Mets | 0 | 0 | 0 | 0 |
| 1971 | New York Mets | 0 | 0 | 0 | 0 |
| 1972 | New York Mets | 0 | 0 | 0 | 0 |
| 1973 | New York Mets | 0 | 0 | 0 | 0 |
| 1974 | New York Mets | 0 | 0 | 0 | 0 |
| 1975 | Pittsburgh Pirates | 0 | 0 | 0 | 0 |
| 1976 | Pittsburgh Pirates | 0 | 0 | 0 | 0 |
| 1977 | Pittsburgh Pirates | 0 | 0 | 0 | 0 |
| 1978 | Pittsburgh Pirates | 0 | 0 | 0 | 0 |
| 1979 | Montreal Expos | 0 | 0 | 0 | 0 |
| 1980 | Detroit Tigers | 0 | 0 | 0 | 0 |
| 1981 | Detroit Tigers | 0 | 0 | 0 | 0 |
| Year | Team | POS | E | DP | A |
|---|---|---|---|---|---|
| 1968 | New York Mets | C | 0 | 0 | 0 |
| 1969 | New York Mets | C | 1 | 0 | 10 |
| 1970 | New York Mets | C | 3 | 6 | 20 |
| 1971 | New York Mets | C | 3 | 3 | 21 |
| 1972 | New York Mets | C | 5 | 12 | 61 |
| 1972 | New York Mets | OF | 1 | 0 | 0 |
| 1973 | New York Mets | C | 2 | 7 | 26 |
| 1974 | New York Mets | C | 4 | 4 | 19 |
| 1975 | Pittsburgh Pirates | C | 2 | 0 | 14 |
| 1976 | Pittsburgh Pirates | C | 2 | 4 | 37 |
| 1977 | Pittsburgh Pirates | C | 2 | 10 | 41 |
| 1978 | Pittsburgh Pirates | C | 3 | 3 | 22 |
| 1979 | Montreal Expos | C | 1 | 1 | 10 |
| 1980 | Detroit Tigers | C | 2 | 2 | 10 |
| 1981 | Detroit Tigers | C | 0 | 0 | 0 |