In his pro baseball career, Hartzell has hit 12 baseballs out of the park while knocking in 404 runs. For his time in baseball, he came to the plate 5,312 times and has come through with a hit 1,158 times. His slugging percentage sits at .146 and he has racked up 1,417 bases. He has fanned 385 times and has gotten a free base on 464 occasions, which contributes in part to a .326 OBP. Hartzell has raked .251 for his career with 515 scored runs and an OPS of .472.
Hartzell has accounted for 12 base hits in 64 at-bats and holds a batting average of .188. He has walked 9 times and is sitting with an OBP of .297. On the year, Hartzell has scored 12 runs, recorded 7 RBI and has earned 0 home runs. He has compiled an OPS of 0.500 and a slugging % of .203. He has been struck out 3 times while earning 13 total bases.
| Year | Team | BA | HR | H | BB | R | RBI | OBP | PA | AB | OPS | OPS+ | 2B | 3B | G | SLG | SB | CS | TB | SO |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Career | .252 | 12 | 1,146 | 455 | 503 | 397 | .327 | 5,234 | 4,548 | .635 | 93 | 112 | 55 | 1,290 | .309 | 182 | 56 | 1,404 | 382 | |
| 1916 | NYY | .188 | 0 | 12 | 9 | 12 | 7 | .297 | 78 | 64 | .500 | 49 | 1 | 0 | 33 | .203 | 1 | 0 | 13 | 3 |
| 1915 | NYY | .251 | 3 | 97 | 57 | 39 | 60 | .351 | 467 | 387 | .664 | 99 | 11 | 2 | 119 | .313 | 7 | 19 | 121 | 37 |
| 1914 | NYY | .233 | 1 | 112 | 68 | 55 | 32 | .335 | 581 | 481 | .643 | 93 | 15 | 9 | 137 | .308 | 22 | 25 | 148 | 38 |
| 1913 | NYY | .259 | 0 | 127 | 67 | 60 | 38 | .353 | 579 | 490 | .653 | 91 | 18 | 1 | 141 | .300 | 26 | 0 | 147 | 40 |
| 1912 | NYY | .272 | 1 | 113 | 64 | 50 | 38 | .370 | 495 | 416 | .726 | 103 | 10 | 11 | 125 | .356 | 20 | 12 | 148 | 35 |
| 1911 | NYY | .296 | 3 | 156 | 63 | 67 | 91 | .375 | 616 | 527 | .763 | 108 | 17 | 11 | 144 | .387 | 22 | 0 | 204 | 34 |
| 1910 | SLB | .218 | 2 | 118 | 49 | 52 | 30 | .290 | 615 | 542 | .561 | 81 | 13 | 5 | 151 | .271 | 18 | 0 | 147 | 43 |
| 1909 | SLB | .271 | 0 | 161 | 29 | 64 | 32 | .312 | 650 | 595 | .620 | 102 | 12 | 5 | 152 | .308 | 14 | 0 | 183 | 50 |
| 1908 | SLB | .265 | 2 | 112 | 19 | 41 | 32 | .302 | 468 | 422 | .622 | 102 | 5 | 6 | 115 | .320 | 24 | 0 | 135 | 38 |
| 1907 | SLB | .236 | 0 | 52 | 11 | 20 | 13 | .285 | 242 | 220 | .581 | 86 | 3 | 5 | 60 | .295 | 7 | 0 | 65 | 19 |
| 1906 | SLB | .213 | 0 | 86 | 19 | 43 | 24 | .266 | 443 | 404 | .496 | 59 | 7 | 0 | 113 | .230 | 21 | 0 | 93 | 45 |