Newcomb will serve as the opening pitcher during Saturday's game against the Cardinals, James Fegan of the Chicago Sun-Times reports.
Gasper went 1-for-3 with a solo home run during the Red Sox's 3-2 loss to the Royals on Friday.
Gray (17-5) was tagged with the loss in Friday's game against the Royals, allowing three runs on six hits and two walks while striking out five across six innings.
Murakami is absent from the lineup for Friday's game in St. Louis.
The Red Sox recalled Seigler from Triple-A Worcester on Friday.
Boston placed White on the 10-day injured list with a right foot ligament injury Friday, retroactive to Sept. 9.
Rutschman (elbow) will start at catcher and bat third in Friday's game against the Royals.
Fedde (8-9) was tagged with the loss versus Pittsburgh on Thursday, allowing two runs on four hits and one walk while striking out one batter over 5.1 relief innings.
Smith tossed two scoreless innings in a no-decision against Pittsburgh on Thursday, allowing two hits and striking out three batters.
Teel isn't in the lineup for Thursday's game against the Pirates.
| PITCHING | INN | W | K | HA | ER | BBI | |
| S. Burke | Sean Burke | 5.7 | 0.26 | 5.8 | 4.8 | 2.0 | 1.5 |
| Relievers | Relievers | 3.3 | 0.22 | 2.6 | 2.8 | 1.6 | 1.7 |
| HITTING | H | R | RBI | TB | BB | SB | |
| S. Antonacci | Sam Antonacci | 0.98 | 0.59 | 0.34 | 1.46 | 0.3 | 0.14 |
| M. Murakami | Munetaka Murakami | 0.95 | 0.64 | 0.62 | 1.95 | 0.57 | 0.01 |
| M. Vargas | Miguel Vargas | 0.92 | 0.59 | 0.58 | 1.81 | 0.46 | 0.08 |
| C. Montgomery | Colson Montgomery | 0.76 | 0.47 | 0.53 | 1.6 | 0.31 | 0.01 |
| A. Benintendi | Andrew Benintendi | 0.88 | 0.47 | 0.54 | 1.58 | 0.34 | 0.01 |
| B. Montgomery | Braden Montgomery | 0.87 | 0.45 | 0.46 | 1.46 | 0.35 | 0.07 |
| T. Peters | Tristan Peters | 0.91 | 0.41 | 0.39 | 1.42 | 0.27 | 0.08 |
| C. Meidroth | Chase Meidroth | 0.89 | 0.46 | 0.27 | 1.23 | 0.35 | 0.03 |
| D. Romo | Drew Romo | 0.62 | 0.35 | 0.37 | 1.12 | 0.27 | 0.02 |
KEY PLAYER INJURIESK. Teel, T. Murray, B. Baldwin, D. Thorpe, J. Leasure, M. Vasil NOT PROJECTED TO START:Luisangel Acuna, Austin Hays, Joey Bart, Randal Grichuk, Brenton Doyle Batting order and lineup confirmed and provided by Rotowire. | |||||||
| PITCHING |
| Sean Burke |
| Relievers |
| HITTING |
| Sam Antonacci |
| Munetaka Murakami |
| Miguel Vargas |
| Colson Montgomery |
| Andrew Benintendi |
| Braden Montgomery |
| Tristan Peters |
| Chase Meidroth |
| Drew Romo |
| INN | W | K | HA | ER | BBI |
| 5.7 | 0.26 | 5.8 | 4.8 | 2.0 | 1.5 |
| 3.3 | 0.22 | 2.6 | 2.8 | 1.6 | 1.7 |
| H | R | RBI | TB | BB | SB |
| 0.98 | 0.59 | 0.34 | 1.46 | 0.3 | 0.14 |
| 0.95 | 0.64 | 0.62 | 1.95 | 0.57 | 0.01 |
| 0.92 | 0.59 | 0.58 | 1.81 | 0.46 | 0.08 |
| 0.76 | 0.47 | 0.53 | 1.6 | 0.31 | 0.01 |
| 0.88 | 0.47 | 0.54 | 1.58 | 0.34 | 0.01 |
| 0.87 | 0.45 | 0.46 | 1.46 | 0.35 | 0.07 |
| 0.91 | 0.41 | 0.39 | 1.42 | 0.27 | 0.08 |
| 0.89 | 0.46 | 0.27 | 1.23 | 0.35 | 0.03 |
| 0.62 | 0.35 | 0.37 | 1.12 | 0.27 | 0.02 |
