The Nationals optioned Bird to Triple-A Rochester following Tuesday's game against the Rockies.
The Nationals are expected to recall Perales from Triple-A Rochester on Wednesday, Kyle Williams of TheBanner.com reports.
Waldron will serve as the opening pitcher in Wednesday's game against Colorado, Mark Zuckerman of NatsJournal.com reports.
The Pirates optioned Curtis to Triple-A Indianapolis on Tuesday, Colin Beazley of the Pittsburgh Post-Gazette reports.
The Pirates recalled Murdock from Triple-A Indianapolis on Tuesday, Colin Beazley of the Pittsburgh Post-Gazette reports.
Ruiz is absent from the lineup for Tuesday's contest versus the Rockies.
Chaparro is absent from the lineup for Tuesday's contest against the Rockies.
The Nationals designated Williams for assignment Tuesday.
Gray (elbow) is scheduled to make the third appearance of his rehab assignment Tuesday with High-A Wilmington, Mark Zuckerman of NatsJournal.com reports.
Vivas went 3-for-5 with two RBI, a run scored and a strikeout during a 13-3 win over Colorado on Monday.
| PITCHING | INN | W | K | HA | ER | BBI | |
| M. Keller | Mitch Keller | 6.1 | 0.26 | 5.2 | 5.4 | 2.6 | 1.4 |
| Relievers | Relievers | 2.9 | 0.17 | 2.9 | 2.7 | 1.4 | 1.1 |
| HITTING | H | R | RBI | TB | BB | SB | |
| J. Triolo | Jared Triolo | 0.55 | 0.3 | 0.23 | 0.84 | 0.33 | 0.07 |
| S. Horwitz | Spencer Horwitz | 0.94 | 0.55 | 0.5 | 1.57 | 0.45 | 0.0 |
| B. Reynolds | Bryan Reynolds | 1.11 | 0.53 | 0.67 | 1.97 | 0.42 | 0.05 |
| A. McCutchen | Andrew McCutchen | 0.83 | 0.48 | 0.43 | 1.46 | 0.51 | 0.02 |
| N. Gonzales | Nick Gonzales | 1.06 | 0.44 | 0.37 | 1.51 | 0.22 | 0.01 |
| O. Cruz | Oneil Cruz | 0.94 | 0.64 | 0.58 | 1.9 | 0.57 | 0.32 |
| C. Devanney | Cam Devanney | 0.81 | 0.4 | 0.35 | 1.24 | 0.29 | 0.11 |
| J. Bae | Ji-hwan Bae | 0.48 | 0.36 | 0.24 | 0.68 | 0.31 | 0.21 |
| H. Davis | Henry Davis | 0.5 | 0.31 | 0.26 | 0.77 | 0.25 | 0.01 |
KEY PLAYER INJURIESNo new major injuries to report NOT PROJECTED TO START:Ronny Simon Batting order and lineup confirmed and provided by Rotowire. | |||||||
| PITCHING |
| Mitch Keller |
| Relievers |
| HITTING |
| Jared Triolo |
| Spencer Horwitz |
| Bryan Reynolds |
| Andrew McCutchen |
| Nick Gonzales |
| Oneil Cruz |
| Cam Devanney |
| Ji-hwan Bae |
| Henry Davis |
| INN | W | K | HA | ER | BBI |
| 6.1 | 0.26 | 5.2 | 5.4 | 2.6 | 1.4 |
| 2.9 | 0.17 | 2.9 | 2.7 | 1.4 | 1.1 |
| H | R | RBI | TB | BB | SB |
| 0.55 | 0.3 | 0.23 | 0.84 | 0.33 | 0.07 |
| 0.94 | 0.55 | 0.5 | 1.57 | 0.45 | 0.0 |
| 1.11 | 0.53 | 0.67 | 1.97 | 0.42 | 0.05 |
| 0.83 | 0.48 | 0.43 | 1.46 | 0.51 | 0.02 |
| 1.06 | 0.44 | 0.37 | 1.51 | 0.22 | 0.01 |
| 0.94 | 0.64 | 0.58 | 1.9 | 0.57 | 0.32 |
| 0.81 | 0.4 | 0.35 | 1.24 | 0.29 | 0.11 |
| 0.48 | 0.36 | 0.24 | 0.68 | 0.31 | 0.21 |
| 0.5 | 0.31 | 0.26 | 0.77 | 0.25 | 0.01 |
