Astros Roster & Staff
Transactions
| Date | Transaction |
| 07/30/18 | Toronto Blue Jays traded RHP Roberto Osuna to Houston Astros for RHP David Paulino, RHP Hector Perez and RHP Ken Giles. |
| 07/30/18 | C Tim Federowicz elected free agency. |
| 07/30/18 | Toronto Blue Jays traded RHP Roberto Osuna to Houston Astros for RHP David Paulino, RHP Hector Perez and RHP Ken Giles. |
| 07/30/18 | Toronto Blue Jays traded RHP Roberto Osuna to Houston Astros for RHP David Paulino, RHP Hector Perez and RHP Ken Giles. |
| 07/30/18 | Toronto Blue Jays traded RHP Roberto Osuna to Houston Astros for RHP David Paulino, RHP Hector Perez and RHP Ken Giles. |
| 07/29/18 | Houston Astros recalled 1B Tyler White from Fresno Grizzlies. |
| 07/29/18 | Houston Astros placed 2B Jose Altuve on the 10-day disabled list retroactive to July 28, 2018. Right knee soreness |
| 07/28/18 | Houston Astros optioned LHP Cionel Perez to Fresno Grizzlies. |
| 07/27/18 | Minnesota Twins traded RHP Ryan Pressly to Houston Astros for CF Gilberto Celestino and RHP Jorge Alcala. |
| 07/27/18 | Minnesota Twins traded RHP Ryan Pressly to Houston Astros for CF Gilberto Celestino and RHP Jorge Alcala. |
| 07/27/18 | Minnesota Twins traded RHP Ryan Pressly to Houston Astros for CF Gilberto Celestino and RHP Jorge Alcala. |
| 07/26/18 | Houston Astros designated C Tim Federowicz for assignment. |
| 07/26/18 | Los Angeles Angels traded C Martin Maldonado to Houston Astros for LHP Patrick Sandoval and Future Considerations. |
| 07/26/18 | Los Angeles Angels traded C Martin Maldonado to Houston Astros for LHP Patrick Sandoval and Future Considerations. |
| 07/20/18 | Houston Astros recalled J.D. Davis from Fresno Grizzlies. |
| 07/16/18 | Houston Astros optioned 3B Tyler White to Fresno Grizzlies. |
| 07/14/18 | Houston Astros activated RHP Gerrit Cole from the bereavement list. |
| 07/14/18 | Houston Astros optioned CF Jake Marisnick to Fresno Grizzlies. |
| 07/13/18 | Houston Astros optioned Brady Rodgers to Fresno Grizzlies. |
| 07/12/18 | Houston Astros sent RHP Brady Rodgers on a rehab assignment to Fresno Grizzlies. |
| 07/11/18 | Houston Astros recalled Cionel Perez from Corpus Christi Hooks. |
| 07/11/18 | Houston Astros optioned RHP Ken Giles to Fresno Grizzlies. |
| 07/10/18 | Houston Astros placed RHP Gerrit Cole on the bereavement list. |
| 07/10/18 | Houston Astros recalled Jake Marisnick from Fresno Grizzlies. |
| 07/09/18 | Houston Astros signed free agent SS Ricardo Balogh to a minor league contract. |
| 07/09/18 | Houston Astros signed free agent RF Granden Goetzman to a minor league contract. |
| 07/07/18 | Houston Astros optioned CF Jake Marisnick to Fresno Grizzlies. |
| 07/07/18 | Houston Astros selected the contract of Kyle Tucker from Fresno Grizzlies. |
| 07/06/18 | Houston Astros traded RHP James Hoyt to Cleveland Indians for RHP Tommy DeJuneas. |
| 07/06/18 | Houston Astros traded RF Jon Kemmer to Minnesota Twins. |
| 07/06/18 | Houston Astros traded RHP James Hoyt to Cleveland Indians for RHP Tommy DeJuneas. |
| 07/04/18 | Houston Astros signed free agent CF Andres Monzon to a minor league contract. |
| 07/03/18 | Houston Astros optioned AJ Reed to Fresno Grizzlies. |
| 07/03/18 | Houston Astros activated RHP Joe Smith from the 10-day disabled list. |
| 07/03/18 | Houston Astros placed C Brian McCann on the 10-day disabled list retroactive to July 1, 2018. Right knee discomfort. |
| 07/03/18 | Houston Astros selected the contract of C Tim Federowicz from Fresno Grizzlies. |
| 07/02/18 | Houston Astros signed free agent RHP Daniel Pacheco to a minor league contract. |
| 07/02/18 | Houston Astros signed free agent SS Ayendy Ortiz to a minor league contract. |
| 07/02/18 | Houston Astros signed free agent RHP Carlos Calderon to a minor league contract. |
| 07/02/18 | Houston Astros signed free agent OF Jesus Liranzo to a minor league contract. |
| 07/02/18 | Houston Astros signed free agent OF Jairo Jose to a minor league contract. |
| 07/02/18 | Houston Astros signed free agent OF Frank Perez to a minor league contract. |
| 07/02/18 | Houston Astros signed free agent RHP Danny Subero to a minor league contract. |
| 07/02/18 | Houston Astros signed RHP Jacob Billingsley. |
| 07/02/18 | Houston Astros signed free agent SS Yohander Martinez to a minor league contract. |
| 07/02/18 | Houston Astros signed free agent OF Tomas Ramirez to a minor league contract. |
| 07/02/18 | Houston Astros signed free agent RHP Reimy Beltre to a minor league contract. |
| 07/02/18 | Houston Astros signed free agent OF Omar Diaz to a minor league contract. |
| 07/02/18 | Houston Astros signed free agent C Miguel Palma to a minor league contract. |
| 07/02/18 | Houston Astros signed free agent RHP Johangel Ramirez to a minor league contract. |
| 07/02/18 | Houston Astros signed free agent SS Cristian Gonzalez to a minor league contract. |
| 07/02/18 | Houston Astros signed RHP J.P. France. |
| 07/01/18 | Houston Astros activated 1B Yuli Gurriel from the paternity list. |
| 07/01/18 | Houston Astros activated 1B Yuli Gurriel from the paternity list. |
| 07/01/18 | Houston Astros optioned LHP Cionel Perez to Corpus Christi Hooks. |
| 07/01/18 | Houston Astros activated 1B Yuli Gurriel from the paternity list. |