Rangers Roster & Staff
Transactions
| Date | Transaction |
| 06/30/12 | Ryan Bores assigned to AZL Rangers from Texas Rangers. |
| 06/30/12 | Tyler Smith assigned to AZL Rangers from Texas Rangers. |
| 06/30/12 | David Lyon assigned to AZL Rangers from Texas Rangers. |
| 06/29/12 | Texas Rangers recalled Yoshinori Tateyama from Round Rock Express. |
| 06/29/12 | Texas Rangers signed LHP Zach Brill. |
| 06/29/12 | Texas Rangers placed RHP Mark Lowe on the 15-day disabled list retroactive to June 26, 2012. Strained right intrcostal muscle. |
| 06/26/12 | Texas Rangers recalled Martin Perez from Round Rock Express. |
| 06/26/12 | Texas Rangers placed RHP Colby Lewis on the 15-day disabled list retroactive to June 24, 2012. Right forearm tendinitis. |
| 06/25/12 | San Diego Padres claimed RHP Mark Hamburger off waivers from Texas Rangers. |
| 06/24/12 | Texas Rangers signed RHP Tyler Smith. |
| 06/23/12 | Texas Rangers signed free agent RHP Alex De La Cruz to a minor league contract. |
| 06/22/12 | Texas Rangers designated Mark Hamburger for assignment. |
| 06/22/12 | Texas Rangers signed RHP Ryan Bores. |
| 06/22/12 | Texas Rangers placed 1B Mitch Moreland on the 15-day disabled list retroactive to June 20, 2012. Left hamstring strain. |
| 06/22/12 | Texas Rangers signed C David Lyon. |
| 06/22/12 | Texas Rangers selected the contract of RHP Roy Oswalt from Round Rock Express. |
| 06/21/12 | Texas Rangers signed free agent LHP Ryne Slack to a minor league contract. |
| 06/20/12 | Lewis Brinson assigned to AZL Rangers from Texas Rangers. |
| 06/20/12 | Janluis Castro assigned to AZL Rangers from Texas Rangers. |
| 06/20/12 | Joey Gallo assigned to AZL Rangers from Texas Rangers. |
| 06/20/12 | Jamie Jarmon assigned to AZL Rangers from Texas Rangers. |
| 06/20/12 | Keone Kela assigned to AZL Rangers from Texas Rangers. |
| 06/20/12 | RHP Brandon Kuter assigned to AZL Rangers from Texas Rangers. |
| 06/20/12 | Chuck Moorman assigned to AZL Rangers from Texas Rangers. |
| 06/20/12 | John Niggli assigned to AZL Rangers from Texas Rangers. |
| 06/20/12 | Paul Schwendel assigned to AZL Rangers from Texas Rangers. |
| 06/20/12 | Collin Wiles assigned to AZL Rangers from Texas Rangers. |
| 06/20/12 | LHP Austen Thrailkill assigned to AZL Rangers from Texas Rangers. |
| 06/20/12 | RHP Casey Shiver assigned to AZL Rangers from Texas Rangers. |
| 06/20/12 | LHP Sam Stafford assigned to AZL Rangers from Texas Rangers. |
| 06/20/12 | Nick Williams assigned to AZL Rangers from Texas Rangers. |
| 06/19/12 | Texas Rangers signed RHP Willie Eyre. |
| 06/17/12 | Texas Rangers signed OF Brandon Garcia. |
| 06/17/12 | Texas Rangers signed C Pat Cantwell. |
| 06/16/12 | Texas Rangers optioned RHP Yoshinori Tateyama to Round Rock Express. |
| 06/16/12 | Texas Rangers selected the contract of Justin Grimm from Frisco RoughRiders. |
| 06/16/12 | Texas Rangers transferred RHP Neftali Feliz from the 15-day disabled list to the 60-day disabled list. |
| 06/15/12 | Texas Rangers recalled Leonys Martin from Round Rock Express. |
| 06/12/12 | Texas Rangers signed free agent RHP Connor Sadzeck to a minor league contract. |
| 06/12/12 | Texas Rangers signed RHP Eric Brooks. |
| 06/12/12 | Texas Rangers placed RHP Alexi Ogando on the 15-day disabled list retroactive to June 11, 2012. Strained right groin. |
| 06/12/12 | Texas Rangers recalled Michael Kirkman from Round Rock Express. |
| 06/12/12 | Texas Rangers activated LHP Michael Kirkman. |
| 06/12/12 | Texas Rangers signed OF Lewis Brinson. |
| 06/12/12 | Texas Rangers signed 3B Joey Gallo. |
| 06/12/12 | Texas Rangers signed RHP Collin Wiles. |
| 06/12/12 | Texas Rangers signed OF Jamie Jarmon. |
| 06/12/12 | Texas Rangers signed OF Nick Williams. |
| 06/11/12 | Texas Rangers signed RHP Brandon Kuter. |
| 06/11/12 | Texas Rangers signed RHP Ryan Harvey. |
| 06/10/12 | Texas Rangers placed RHP Koji Uehara on the 15-day disabled list. right lat strain |
| 06/09/12 | St. Louis Cardinals claimed John Gaub off waivers from Texas Rangers. |
| 06/07/12 | Texas Rangers signed LHP Sam Stafford. |
| 06/07/12 | Texas Rangers placed LHP Derek Holland on the 15-day disabled list retroactive to June 6, 2012. Left shoulder fatigue. |
| 06/07/12 | Texas Rangers selected the contract of Tanner Scheppers from Round Rock Express. |
| 06/07/12 | Texas Rangers designated John Gaub for assignment. |
| 06/07/12 | Texas Rangers signed RHP Alec Asher. |
| 06/07/12 | Texas Rangers signed OF Preston Beck. |
| 06/07/12 | Texas Rangers signed OF Royce Bolinger. |
| 06/07/12 | Texas Rangers signed 2B Cam Schiller. |
| 06/07/12 | Texas Rangers signed RHP Cody Kendall. |
| 06/07/12 | Texas Rangers signed RHP John Niggli. |
| 06/07/12 | Texas Rangers signed RHP Casey Shiver. |
| 06/07/12 | Texas Rangers signed RHP Keone Kela. |
| 06/07/12 | Texas Rangers signed 2B Janluis Castro. |
| 06/07/12 | Texas Rangers signed C Chuck Moorman. |
| 06/07/12 | Texas Rangers signed RHP Josh McElwee. |
| 06/07/12 | Texas Rangers signed RHP Coby Cowgill. |
| 06/07/12 | Texas Rangers signed SS Gabriel Roa. |
| 06/07/12 | Texas Rangers signed LHP Austen Thrailkill. |
| 06/07/12 | Texas Rangers signed LHP Joe Burns. |
| 06/07/12 | Texas Rangers signed OF Barrett Serrato. |
| 06/07/12 | Texas Rangers signed RHP Paul Schwendel. |
| 06/06/12 | Texas Rangers signed free agent LHP Gionny Fracchiolla to a minor league contract. |
| 06/01/12 | Texas Rangers signed free agent RHP Albert Decena to a minor league contract. |
| 06/01/12 | Texas Rangers signed free agent IF Rodrigo Ayarza to a minor league contract. |
| 06/01/12 | Texas Rangers signed free agent C Oliver Caraballo to a minor league contract. |
| 06/01/12 | Texas Rangers signed free agent LHP Felix Carvallo to a minor league contract. |
| 06/01/12 | Texas Rangers signed free agent RHP Rafael Cedeno to a minor league contract. |
| 06/01/12 | Texas Rangers signed free agent C Carlos Garay to a minor league contract. |
| 06/01/12 | Texas Rangers signed free agent LHP Yohander Mendez to a minor league contract. |
| 06/01/12 | Texas Rangers signed free agent RHP Pedro Payano to a minor league contract. |
| 06/01/12 | Texas Rangers signed free agent OF Eduard Pinto to a minor league contract. |
| 06/01/12 | Texas Rangers signed free agent RHP Stanley Solano to a minor league contract. |
| 06/01/12 | Texas Rangers signed free agent RHP Kevin Sosa to a minor league contract. |
| 06/01/12 | Texas Rangers signed free agent C Ricardo Valencia to a minor league contract. |
| 06/01/12 | Texas Rangers signed free agent RHP Daris Vargas to a minor league contract. |
| 06/01/12 | Texas Rangers signed free agent RHP Anyenil Mendoza to a minor league contract. |