| | | Full Name: Frank Thomas Duffy | | |
| Born: 10/14/1946, Oakland, CA | | |
| Height: 6'1" | Weight: 180 | Bats: Right | Throws: Right | |
| Debut: 9/4/1970 | Final Game: 5/11/1979 | |
| Batting Stats | | 1970 | CIN | NL | 6 | 11 | 1 | 2 | 2 | 0 | 0 | 0 | 1 | 0 | 0 | 2 | 0 | 0 | 1 | 0 | 4 | 12 | 0 | .182 | .364 | .250 | | 1971 | CIN | NL | 13 | 16 | 0 | 3 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 2 | 0 | 0 | 0 | 0 | 4 | 17 | 0 | .188 | .250 | .235 | | | SFG | | 21 | 28 | 4 | 5 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 10 | 1 | 0 | 0 | 0 | 5 | 29 | 1 | .179 | .179 | .179 | | | TOT | | 34 | 44 | 4 | 8 | 1 | 0 | 0 | 3 | 1 | 0 | 0 | 12 | 1 | 0 | 0 | 0 | 9 | 46 | 1 | .182 | .205 | .200 | | 1972 | CLE | AL | 130 | 385 | 23 | 92 | 16 | 4 | 3 | 27 | 31 | 5 | 1 | 54 | 10 | 1 | 6 | 2 | 125 | 428 | 12 | .239 | .325 | .297 | | 1973 | CLE | AL | 116 | 361 | 34 | 95 | 16 | 4 | 8 | 50 | 25 | 0 | 2 | 41 | 4 | 3 | 6 | 6 | 143 | 395 | 12 | .263 | .396 | .312 | | 1974 | CLE | AL | 158 | 549 | 62 | 128 | 18 | 0 | 8 | 48 | 30 | 0 | 0 | 64 | 16 | 1 | 7 | 8 | 170 | 596 | 10 | .233 | .310 | .272 | | 1975 | CLE | AL | 146 | 482 | 44 | 117 | 22 | 2 | 1 | 47 | 27 | 0 | 2 | 60 | 6 | 4 | 10 | 10 | 146 | 521 | 12 | .243 | .303 | .283 | | 1976 | CLE | AL | 133 | 392 | 38 | 83 | 11 | 2 | 2 | 30 | 29 | 2 | 2 | 50 | 12 | 2 | 10 | 0 | 104 | 437 | 13 | .212 | .265 | .268 | | 1977 | CLE | AL | 122 | 334 | 30 | 67 | 13 | 2 | 4 | 31 | 21 | 0 | 0 | 47 | 13 | 1 | 8 | 3 | 96 | 369 | 8 | .201 | .287 | .247 | | 1978 | BOS | AL | 64 | 104 | 12 | 27 | 5 | 0 | 0 | 4 | 6 | 0 | 1 | 11 | 6 | 0 | 1 | 1 | 32 | 117 | 1 | .260 | .308 | .306 | | 1979 | BOS | AL | 6 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 3 | 0 | .000 | .000 | .000 | | 10 Seasons | 915 | 2665 | 248 | 619 | 104 | 14 | 26 | 240 | 171 | 7 | 8 | 342 | 68 | 12 | 49 | 30 | 829 | 2924 | 69 | .232 | .311 | .279 | | |
| Fielding Stats | | 1970 | CIN | NL | SS | 5 | | | 4 | 12 | 0 | 4 | 1.000 | | 1971 | CIN | NL | SS | 10 | | | 10 | 24 | 2 | 5 | .944 | | | SFG | | SS | 6 | | | 13 | 17 | 1 | 5 | .968 | | | | | 2B | 1 | | | 1 | 1 | 0 | 0 | 1.000 | | | | | 3B | 1 | | | 0 | 1 | 0 | 0 | 1.000 | | | TOT | | SS | 16 | | | 23 | 41 | 3 | 10 | .955 | | 1972 | CLE | AL | SS | 126 | | | 197 | 360 | 13 | 75 | .977 | | 1973 | CLE | AL | SS | 115 | | | 198 | 377 | 8 | 82 | .986 | | 1974 | CLE | AL | SS | 158 | | | 242 | 491 | 15 | 83 | .980 | | 1975 | CLE | AL | SS | 145 | | | 225 | 464 | 16 | 85 | .977 | | 1976 | CLE | AL | SS | 132 | | | 222 | 344 | 10 | 83 | .983 | | 1977 | CLE | AL | SS | 121 | | | 145 | 301 | 15 | 62 | .967 | | 1978 | BOS | AL | 3B | 22 | | | 10 | 14 | 1 | 1 | .960 | | | | | SS | 21 | | | 36 | 55 | 7 | 13 | .929 | | | | | 2B | 12 | | | 17 | 29 | 0 | 5 | 1.000 | | | | | DH | 6 | | | | | | | | | 1979 | BOS | AL | 2B | 3 | | | 3 | 2 | 0 | 0 | 1.000 | | | | | 1B | 1 | | | 0 | 0 | 0 | 0 | .000 | | Totals | SS | 839 | 0 | 0.0 | 1292 | 2445 | 87 | 497 | .977 | | | 3B | 23 | 0 | 0.0 | 10 | 15 | 1 | 1 | .962 | | | 2B | 16 | 0 | 0.0 | 21 | 32 | 0 | 5 | 1.000 | | | DH | 6 | | | | | | | | | | 1B | 1 | 0 | 0.0 | 0 | 0 | 0 | 0 | .000 | | 10 Seasons | | 879 | 0 | 0.0 | 1323 | 2492 | 88 | 503 | .977 | | |
| Postseason Batting Stats | | 1971 | SFG | NLCS | NL | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | .000 | .000 | .000 | | |
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