Lambert (8-7) allowed nine runs on eight hits and two walks while striking out three batters over 3.2 innings in a loss to the Angels on Thursday.
The Astros designated Velazquez for assignment Thursday.
The Astros recalled Delgado from Triple-A Sugar Land on Thursday.
Walker isn't in the lineup for Thursday's game against the Angels, Chandler Rome of The Athletic reports.
Diaz isn't in the lineup for Thursday's game against the Angels, Chandler Rome of The Athletic reports.
Gasper served as the designated hitter and went 1-for-3 with a three-run home run in Wednesday's 7-6 extra-inning loss to Arizona.
Jones (hip) entered Wednesday's game as a pinch hitter and finished as the designated hitter. He walked in his lone plate appearance in a 7-6 extra-inning loss to the Diamondbacks.
Gasper served as the designated hitter and went 1-for-3 with a home run and three RBI in Wednedsay's 7-6 extra-inning loss to Arizona.
Pecko allowed two runs on three hits, three walks and a hit batsman while striking out four over 3.2 innings in a no-decision versus the Angels on Wednesday.
Hader walked one and struck out none in a scoreless and hitless inning to earn the save in Wednesday's 3-2 win over the Angels.
| PITCHING | INN | W | K | HA | ER | BBI | |
| W. Buehler | Walker Buehler | 5.4 | 0.23 | 4.0 | 5.7 | 3.0 | 1.6 |
| Relievers | Relievers | 3.6 | 0.23 | 3.7 | 2.8 | 0.9 | 1.1 |
| HITTING | H | R | RBI | TB | BB | SB | |
| R. Anthony | Roman Anthony | 0.97 | 0.56 | 0.46 | 1.64 | 0.43 | 0.09 |
| A. Bregman | Alex Bregman | 1.15 | 0.64 | 0.64 | 2.16 | 0.36 | 0.02 |
| J. Duran | Jarren Duran | 1.08 | 0.6 | 0.46 | 1.9 | 0.38 | 0.21 |
| T. Story | Trevor Story | 0.93 | 0.48 | 0.5 | 1.47 | 0.22 | 0.19 |
| M. Yoshida | Masataka Yoshida | 0.7 | 0.27 | 0.36 | 1.09 | 0.14 | 0.04 |
| R. Gonzalez | Romy Gonzalez | 0.71 | 0.34 | 0.36 | 1.13 | 0.19 | 0.07 |
| W. Abreu | Wilyer Abreu | 0.89 | 0.54 | 0.69 | 1.81 | 0.38 | 0.06 |
| C. Rafaela | Ceddanne Rafaela | 0.86 | 0.53 | 0.38 | 1.36 | 0.15 | 0.16 |
| C. Wong | Connor Wong | 0.6 | 0.31 | 0.24 | 0.87 | 0.15 | 0.03 |
KEY PLAYER INJURIESNo new major injuries to report NOT PROJECTED TO START:Ali Sanchez Batting order and lineup confirmed and provided by Rotowire. | |||||||
| PITCHING |
| Walker Buehler |
| Relievers |
| HITTING |
| Roman Anthony |
| Alex Bregman |
| Jarren Duran |
| Trevor Story |
| Masataka Yoshida |
| Romy Gonzalez |
| Wilyer Abreu |
| Ceddanne Rafaela |
| Connor Wong |
| INN | W | K | HA | ER | BBI |
| 5.4 | 0.23 | 4.0 | 5.7 | 3.0 | 1.6 |
| 3.6 | 0.23 | 3.7 | 2.8 | 0.9 | 1.1 |
| H | R | RBI | TB | BB | SB |
| 0.97 | 0.56 | 0.46 | 1.64 | 0.43 | 0.09 |
| 1.15 | 0.64 | 0.64 | 2.16 | 0.36 | 0.02 |
| 1.08 | 0.6 | 0.46 | 1.9 | 0.38 | 0.21 |
| 0.93 | 0.48 | 0.5 | 1.47 | 0.22 | 0.19 |
| 0.7 | 0.27 | 0.36 | 1.09 | 0.14 | 0.04 |
| 0.71 | 0.34 | 0.36 | 1.13 | 0.19 | 0.07 |
| 0.89 | 0.54 | 0.69 | 1.81 | 0.38 | 0.06 |
| 0.86 | 0.53 | 0.38 | 1.36 | 0.15 | 0.16 |
| 0.6 | 0.31 | 0.24 | 0.87 | 0.15 | 0.03 |
