Mariners Roster & Staff
Transactions
| Date | Transaction |
| 06/30/16 | Seattle Mariners recalled RHP Tom Wilhelmsen from Tacoma Rainiers. |
| 06/30/16 | Seattle Mariners placed C Steve Clevenger on the 15-day disabled list. Fractured third metacarpal in right hand. |
| 06/30/16 | Seattle Mariners optioned RHP Donn Roach to Tacoma Rainiers. |
| 06/30/16 | RHP Ted Hammond assigned to Seattle Mariners. |
| 06/30/16 | Seattle Mariners recalled Mike Zunino from Tacoma Rainiers. |
| 06/29/16 | Seattle Mariners activated LHP Wade Miley from the 15-day disabled list. |
| 06/29/16 | Seattle Mariners placed RHP Nick Vincent on the 15-day disabled list retroactive to June 27, 2016. Mid-back strain. |
| 06/27/16 | Seattle Mariners sent C Jesus Sucre on a rehab assignment to Tacoma Rainiers. |
| 06/26/16 | Seattle Mariners signed free agent C P.J. Jones to a minor league contract. |
| 06/24/16 | Seattle Mariners transferred RHP Tony Zych from the 15-day disabled list to the 60-day disabled list. Rotator cuff tendinitis in right shoulder. |
| 06/24/16 | Seattle Mariners placed RHP Adrian Sampson on the 15-day disabled list. Right flexor bundle strain. |
| 06/24/16 | Seattle Mariners optioned RHP Tom Wilhelmsen to Tacoma Rainiers. |
| 06/24/16 | Seattle Mariners selected the contract of Donn Roach from Tacoma Rainiers. |
| 06/24/16 | Seattle Mariners optioned LF Norichika Aoki to Tacoma Rainiers. |
| 06/24/16 | Seattle Mariners selected the contract of LHP Wade LeBlanc from Tacoma Rainiers. |
| 06/24/16 | Seattle Mariners recalled David Rollins from Tacoma Rainiers. |
| 06/24/16 | Seattle Mariners sent LHP Wade Miley on a rehab assignment to Everett AquaSox. |
| 06/23/16 | Seattle Mariners placed CF Boog Powell on the restricted list. |
| 06/22/16 | Seattle Mariners signed free agent Tom Wilhelmsen. |
| 06/22/16 | Toronto Blue Jays traded LHP Wade LeBlanc to Seattle Mariners for Player To Be Named Later. |
| 06/22/16 | Seattle Mariners transferred LHP Charlie Furbush from the 15-day disabled list to the 60-day disabled list. Left biceps tendinitis. |
| 06/22/16 | Seattle Mariners optioned RHP Jonathan Aro to Tacoma Rainiers. |
| 06/20/16 | Seattle Mariners sent C Jesus Sucre on a rehab assignment to AZL Mariners. |
| 06/20/16 | Seattle Mariners signed free agent 1B Nick Halamandaris to a minor league contract. |
| 06/20/16 | Seattle Mariners signed RHP David Ellingson. |
| 06/20/16 | Seattle Mariners signed OF DeAires Moses. |
| 06/20/16 | Seattle Mariners signed free agent LHP Steven Moyers to a minor league contract. |
| 06/20/16 | Seattle Mariners signed C Nick Thurman. |
| 06/19/16 | Seattle Mariners sent RHP Steve Johnson outright to Tacoma Rainiers. |
| 06/19/16 | Seattle Mariners traded SS Chris Taylor to Los Angeles Dodgers for RHP Zach Lee. |
| 06/19/16 | Seattle Mariners traded SS Chris Taylor to Los Angeles Dodgers for RHP Zach Lee. |
| 06/18/16 | Seattle Mariners optioned LHP David Rollins to Tacoma Rainiers. |
| 06/18/16 | Seattle Mariners selected the contract of RHP Adrian Sampson from Tacoma Rainiers. |
| 06/17/16 | Seattle Mariners placed LHP Wade Miley on the 15-day disabled list retroactive to June 13, 2016. Left shoulder impingement |
| 06/17/16 | Seattle Mariners recalled Jonathan Aro from Tacoma Rainiers. |
| 06/17/16 | Seattle Mariners recalled David Rollins from Tacoma Rainiers. |
| 06/17/16 | Seattle Mariners designated RHP Steve Johnson for assignment. |
| 06/17/16 | Seattle Mariners signed OF Dimas Ojeda. |
| 06/17/16 | Seattle Mariners signed RHP Reggie McClain. |
| 06/17/16 | Seattle Mariners signed free agent C Ray Guerrini to a minor league contract. |
| 06/17/16 | Seattle Mariners signed 3B Joe Rizzo. |
| 06/17/16 | Seattle Mariners signed LHP Thomas Burrows. |
| 06/16/16 | Seattle Mariners signed 2B Joseph Venturino. |
| 06/16/16 | Seattle Mariners signed OF Jansiel Rivera. |
| 06/16/16 | Seattle Mariners signed LHP Tim Viehoff. |
| 06/16/16 | Seattle Mariners signed RHP Steven Ridings. |
| 06/16/16 | Seattle Mariners signed IF David Greer. |
| 06/15/16 | Seattle Mariners signed RHP Jack Anderson. |
| 06/14/16 | Seattle Mariners signed C Jason Goldstein. |
| 06/14/16 | Seattle Mariners signed RHP Matthew Festa. |
| 06/14/16 | Seattle Mariners signed RHP Paul Covelle. |
| 06/14/16 | Seattle Mariners signed RHP Kyle Davis. |
| 06/14/16 | Seattle Mariners signed OF Austin Grebeck. |
| 06/14/16 | Seattle Mariners signed RHP Michael Koval. |
| 06/14/16 | Seattle Mariners signed LHP Elliot Surrey. |
| 06/14/16 | Seattle Mariners signed 3B Nick Zammarelli. |
| 06/14/16 | Seattle Mariners signed RHP Brandon Miller. |
| 06/14/16 | Seattle Mariners signed IF Bryson Brigman. |
| 06/14/16 | Seattle Mariners signed LHP Danny Garcia. |
| 06/14/16 | Seattle Mariners signed SS Donnie Walton. |
| 06/14/16 | Seattle Mariners signed RHP Robert Dugger. |
| 06/14/16 | Seattle Mariners signed OF Eric Filia. |
| 06/14/16 | Seattle Mariners signed OF Kyle Lewis. |
| 06/12/16 | Seattle Mariners signed free agent LHP Joselito Cano to a minor league contract. |
| 06/11/16 | Seattle Mariners traded RHP Justin De Fratus to Texas Rangers. As the player to be named later to complete the Patrick Kivlehan trade from May 29,2016. |
| 06/10/16 | Seattle Mariners activated CF Leonys Martin from the 15-day disabled list. |
| 06/10/16 | Seattle Mariners optioned 2B Luis Sardinas to Tacoma Rainiers. |
| 06/09/16 | Seattle Mariners signed free agent RHP Jarrett Grube to a minor league contract. |
| 06/06/16 | Seattle Mariners optioned RF Stefen Romero to Tacoma Rainiers. |
| 06/06/16 | Seattle Mariners activated SS Ketel Marte from the 15-day disabled list. |
| 06/04/16 | Seattle Mariners released RHP Joel Peralta. |
| 06/04/16 | Seattle Mariners selected the contract of RHP Edwin Diaz from Jackson Generals. |
| 06/04/16 | Seattle Mariners optioned RHP Cody Martin to Tacoma Rainiers. |
| 06/02/16 | Seattle Mariners recalled Cody Martin from Tacoma Rainiers. |
| 06/02/16 | Seattle Mariners designated RHP Joel Peralta for assignment. |
| 06/01/16 | Seattle Mariners recalled LHP James Paxton from Tacoma Rainiers. |
| 06/01/16 | Seattle Mariners placed RHP Felix Hernandez on the 15-day disabled list retroactive to May 28, 2016. Strained right calf. |
| 06/01/16 | Seattle Mariners signed free agent LF Jose Sandoval to a minor league contract. |