Chapman (abdomen) will undergo season-ending surgery Tuesday, Alex Pavlovic of NBC Sports Bay Area reports.
Mayer (forearm) could be cleared to begin a rehab assignment next week, Alex Pavlovic of NBC Sports Bay Area reports.
The Giants selected Harris' contract from Triple-A Sacramento on Friday.
Brubaker will get the start in Friday's bullpen game against the Tigers, Susan Slusser of the San Francisco Chronicle reports.
Leonard went 1-for-3 with a double in Wednesday's 6-0 loss to the Rangers.
Bericoto (oblique) went 1-for-3 with a double, an RBI and a run scored in Triple-A Sacramento's 13-10 extra-innings loss to Round Rock on Wednesday.
Sugano (11-5) took the loss Wednesday against the Rays, allowing three runs on five hits and two walks over five innings. He struck out three.
Whisenhunt (2-3) took the loss Wednesday, giving up four runs on five hits and three walks over 3.1 innings as the Giants were downed 6-0 by the Rangers. He struck out four.
Johnston is out of the lineup for Wednesday's game against the Rays.
Koss is out of the lineup for Wednesday's game against the Rangers.
| PITCHING | INN | W | K | HA | ER | BBI | |
| T. Mahle | Tyler Mahle | 5.5 | 0.27 | 4.7 | 5.5 | 2.8 | 1.6 |
| Relievers | Relievers | 3.5 | 0.32 | 3.1 | 3.2 | 1.3 | 1.4 |
| HITTING | H | R | RBI | TB | BB | SB | |
| L. Arraez | Luis Arraez | 1.62 | 0.72 | 0.56 | 2.29 | 0.26 | 0.11 |
| C. Schmitt | Casey Schmitt | 1.36 | 0.65 | 0.76 | 2.37 | 0.18 | 0.09 |
| H. Ramos | Heliot Ramos | 1.36 | 0.74 | 0.76 | 2.32 | 0.27 | 0.03 |
| R. Devers | Rafael Devers | 1.26 | 0.78 | 0.86 | 2.52 | 0.53 | 0.01 |
| J. Hoo | Jung Hoo Lee | 1.51 | 0.79 | 0.52 | 2.33 | 0.23 | 0.1 |
| W. Adames | Willy Adames | 1.18 | 0.73 | 0.73 | 2.22 | 0.35 | 0.07 |
| B. Eldridge | Bryce Eldridge | 1.16 | 0.66 | 0.56 | 2.0 | 0.48 | 0.02 |
| D. Gilbert | Drew Gilbert | 0.99 | 0.57 | 0.53 | 1.7 | 0.37 | 0.03 |
| D. Cavanaugh | Drew Cavanaugh | 1.05 | 0.5 | 0.59 | 1.69 | 0.28 | 0.02 |
KEY PLAYER INJURIESM. Chapman, M. Gage, R. Wick, R. Rodriguez, H. Birdsong, J. Butto, J. Peguero, K. Winn NOT PROJECTED TO START:Eric Haase, Christian Koss, Victor Bericoto, Jonah Cox Batting order and lineup confirmed and provided by Rotowire. | |||||||
| PITCHING |
| Tyler Mahle |
| Relievers |
| HITTING |
| Luis Arraez |
| Casey Schmitt |
| Heliot Ramos |
| Rafael Devers |
| Jung Hoo Lee |
| Willy Adames |
| Bryce Eldridge |
| Drew Gilbert |
| Drew Cavanaugh |
| INN | W | K | HA | ER | BBI |
| 5.5 | 0.27 | 4.7 | 5.5 | 2.8 | 1.6 |
| 3.5 | 0.32 | 3.1 | 3.2 | 1.3 | 1.4 |
| H | R | RBI | TB | BB | SB |
| 1.62 | 0.72 | 0.56 | 2.29 | 0.26 | 0.11 |
| 1.36 | 0.65 | 0.76 | 2.37 | 0.18 | 0.09 |
| 1.36 | 0.74 | 0.76 | 2.32 | 0.27 | 0.03 |
| 1.26 | 0.78 | 0.86 | 2.52 | 0.53 | 0.01 |
| 1.51 | 0.79 | 0.52 | 2.33 | 0.23 | 0.1 |
| 1.18 | 0.73 | 0.73 | 2.22 | 0.35 | 0.07 |
| 1.16 | 0.66 | 0.56 | 2.0 | 0.48 | 0.02 |
| 0.99 | 0.57 | 0.53 | 1.7 | 0.37 | 0.03 |
| 1.05 | 0.5 | 0.59 | 1.69 | 0.28 | 0.02 |
