The Seattle Mariners acquired pitcher Diego Castillo from the Tampa Bay Rays for pitcher JT Chargois and infielder Austin Shenton.

The Seattle Mariners acquired pitcher Tyler Anderson from the Pittsburgh Pirates for catcher Carter Bins and pitcher Joaquin Tejada.

The Houston Astros acquired pitchers Kendall Graveman and Rafael Montero from the Seattle Mariners for infielder Abraham Toro and pitcher Joe Smith.

The Seattle Mariners acquired infielder/outfielder Wyatt Mathisen from the Tampa Bay Rays for cash.

The Boston Red Sox acquired pitcher Yacksel Rios from the Seattle Mariners for cash.

The Seattle Mariners acquired first baseman/outfielder Jake Bauers from the Cleveland Indians for a player to be named later (Damon Casetta-Stubbs - 07/09/21) or cash considerations.

The Seattle Mariners acquired pitcher Yacksel Rios from the Tampa Bay Rays for cash.

The Kansas City Royals acquired pitcher Domingo Tapia from the Seattle Mariners for cash.

The Milwaukee Brewers acquired catcher Jacob Notthingham from the Seattle Mariners for cash.

The Seattle Mariners acquired pitcher Rafael Montero from the Texas Rangers for pitcher Jose Corniell and a player to be named later (Andres Mesa - 06/14/2021).

The San Diego Padres acquired pitcher Taylor Williams from the Seattle Mariners for a player to be named later (Matt Brash - 09/17/20).

The San Diego Padres acquired catcher/infielder Austin Nola and pitchers Austin Adams and Dan Altavilla from the Seattle Mariners for outfielder Taylor Trammell, pitcher Andres Munoz, infielder Ty France and catcher Luis Torrens.

The Toronto Blue Jays acquired pitcher Taijuan Walker from the Seattle Mariners for a player to be named later or cash considerations.

The Toronto Blue Jays acquired first baseman/designated hitter Daniel Vogelbach from the Seattle Mariners for cash.

The Seattle Mariners acquired pitcher Jimmy Yacabonis from the San Diego Padres for cash.

The Milwaukee Brewers acquired catcher Omar Narvaez from the Seattle Mariners for pitcher Adam Hill and a supplemental second-round draft pick in 2020.

The Seattle Mariners acquired pitcher Nestor Cortes from the New York Yankees for international bonus pool money in 2019-20.

The Los Angeles Dodgers acquired catcher Jose Lobaton from the Seattle Mariners for cash.

The Minnesota Twins acquired outfielder Ian Miller from the Seattle Mariners for cash.

The Arizona Diamondbacks acquired pitcher Mike Leake and cash from the Seattle Mariners for infielder Jose Caballero.

The Washington Nationals acquired pitchers Hunter Strickland from the Seattle Mariners for pitchers Aaron Fletcher, Taylor Guilbeau and Elvis Alvarado.

The Los Angeles Dodgers acquired infielder/outfielder Kristopher Negron from the Seattle Mariners for infielder Daniel Castro.

The Seattle Mariners acquired Matt Magill from the Minnesota Twins for cash.

The Seattle Mariners acquired pitcher Matt Wisler from the San Diego Padres for cash.

The New York Yankees acquired designated hitter/first baseman Edwin Encarnacion and cash from the Seattle Mariners for pitcher Juan Then.

The Seattle Mariners acquired outfielder John Andreoli from the Minnesota Twins for a player to be named later or cash considerations.

The Philadelphia Phillies acquired outfielder Jay Bruce and cash from the Seattle Mariners for infielder Jake Scheiner.

The Seattle Mariners acquired infielder Mike Ahmed from the Los Angeles Dodgers for cash.

The Atlanta Braves acquired pitcher Anthony Swarzak and cash from the Seattle Mariners for pitchers Arodys Vizcaino and Jesse Biddle.

The Seattle Mariners acquired pitcher Austin Adams from the Washington Nationals for pitcher Nick Wells and cash.

The Seattle Mariners acquired pitcher Mike Wright from the Baltimore Orioles for infielder Ryne Ogren.

The Milwaukee Brewers acquired catcher David Freitas from the Seattle Mariners for pitcher Sal Biasi.

The Seattle Mariners acquired pitcher Connor Sadzeck from the Texas Rangers for pitcher Grant Anderson.

The Seattle Mariners acquired catcher Tom Murphy from the San Francisco Giants for pitcher Jesus Ozoria.

In a three-way trade, the Cincinnati Reds acquired pitchers Sonny Gray and Reiver Sanmartin from the New York Yankees; New York acquired outfielder Josh Stowers from the Seattle Mariners and a competitive balance round A draft pick in 2019 from the Reds, and Seattle acquired outfielder/infielder Shed Long from the Reds.

The Seattle Mariners acquired outfielder Domingo Santana from the Milwaukee Brewers for outfielder Ben Gamel and pitcher Noah Zavolas.

In a three-team trade, the Cleveland Indians acquired infielder Carlos Santana and cash from the Seattle Mariners and outfielder/first baseman Jake Bauers from the Tampa Bay Rays; Tampa Bay acquired infielder Yandy Diaz and pitcher Cole Sulser from the Indians, and Seattle acquired infielder Edwin Encarnacion and a competitive balance round B draft pick in 2019 from the Indians, and cash from the Rays.

The Philadelphia Phillies acquired shortstop Jean Segura and pitchers Juan Nicasio and James Pazos from the Seattle Mariners for first baseman Carlos Santana and infielder J.P. Crawford.

The New York Mets acquired pitcher Edwin Diaz, infielder Robinson Cano and cash from the Seattle Mariners for outfielder/first baseman Jay Bruce, pitchers Anthony Swarzak, Justin Dunn and Gerson Bautista, and outfielder Jarred Kelenic.

The Chicago White Sox acquired pitcher Alex Colome from the Seattle Mariners for catcher Omar Narvaez.

The Seattle Mariners acquired pitcher Ricardo Sanchez from the Atlanta Braves for cash.

The New York Yankees acquired pitcher James Paxton from the Seattle Mariners for pitchers Justus Sheffield and Erik Swanson, plus outfielder Dom Thompson-Williams.

The Tampa Bay Rays acquired catcher Mike Zunino, outfielder Guillermo Heredia and pitcher Michael Plassmeyer from the Seattle Mariners for outfielders Mallex Smith and Jake Fraley.

The Seattle Mariners acquired infielder/outfielder Kristopher Negron from the Arizona Diamondbacks for cash.

The Seattle Mariners acquired outfielder Cameron Maybin from the Miami Marlins for infielder Bryson Brigman and international bonus pool money in 2018-19.

The Seattle Mariners acquired pitcher Adam Warren from the New York Yankees for international bonus pool money in 2018-19.

The Seattle Mariners acquired pitcher Zach Duke and cash from the Minnesota Twins for pitcher Chase De Jong and infielder Ryan Costello.

The Seattle Mariners acquired pitcher Sam Tuivailala from the St. Louis Cardinals for pitcher Seth Elledge.

The Seattle Mariners acquired outfielder Denard Span, pitcher Alex Colome and cash from the Tampa Bay Rays for pitchers Tommy Romero and Andrew Moore.

The Seattle Mariners acquired pitcher Roenis Elias from the Boston Red Sox for a player to be named later (Eric Filia 06/12/18).

The Seattle Mariners acquired pitcher Edwin Quezada from the Arizona Diamondbacks for international bonus pool money in 2017-18.

The Seattle Mariners acquired pitcher Shawn Armstrong from the Cleveland Indians for international bonus pool money in 2017-18.

The Seattle Mariners acquired infielder/outfielder Dee Gordon and international bonus pool money in 2017-18 from the Miami Marlins for pitcher Nick Neidert, infielder Christopher Torres and pitcher Robert Dugger.

The Seattle Mariners acquired pitcher Nick Rumbelow from the New York Yankees for pitchers JP Sears and Juan Then.

The Chicago White Sox acquired pitcher Thyago Vieira from the Seattle Mariners for international bonus pool money in 2017-18.

The Seattle Mariners acquired designated hitter Ryon Healy from the Oakland Athletics for pitcher Emilio Pagan and infielder Alexander Campos.

The Chicago Cubs acquired outfielder Leonys Martin and cash from the Seattle Mariners for a player to be named later or cash considerations.

The Seattle Mariners acquired pitcher Mike Leake, international bonus pool money in 2017-18 and cash from the St. Louis Cardinals for infielder Rayder Ascanio.

The Seattle Mariners acquired pitcher Andrew Albers from the Atlanta Braves for cash.

The Seattle Mariners acquired first baseman Yonder Alonso from the Oakland Athletics for outfielder Boog Powell.

The Tampa Bay Rays acquired pitcher Steve Cishek and cash from the Seattle Mariners for pitcher Erasmo Ramirez.

The Seattle Mariners acquired pitcher Marco Gonzales from the St. Louis Cardinals for outfielder Tyler O'Neill.

The Seattle Mariners acquired pitcher David Phelps from the Miami Marlins for outfielder Brayan Hernandez and pitchers Brandon Miller, Pablo Lopez and Lukas Schiraldi.

The Seattle Mariners acquired outfielder Andrew Aplin from the Houston Astros for cash.

The Seattle Mariners acquired infielder Seth Mejias-Brean from the Cincinnati Reds for cash.

The Baltimore Orioles acquired pitcher Paul Fry from the Seattle Mariners for international bonus slot four in 2016-17.

The Philadelphia Phillies acquired pitcher Pat Venditte from the Seattle Mariners for outfielder Joey Curletta.

The Seattle Mariners acquired pitcher Chase De Jong from the Los Angeles Dodgers for infielder Drew Jackson and pitcher Aneurys Zabala.

The Tampa Bay Rays acquired catcher Jesus Sucre from the Seattle Mariners for a player to be named later or cash considerations.

The Seattle Mariners acquired pitcher Dillon Overton from the Oakland Athletics for catcher Jason Goldstein.

The Seattle Mariners acquired pitcher Drew Smyly from the Tampa Bay Rays for outfielder Mallex Smith, infielder Carlos Vargas and pitcher Ryan Yarbrough.

The Seattle Mariners acquired outfielder Mallex Smith and pitcher Shae Simmons from the Atlanta Braves for pitchers Luiz Gohara and Thomas Burrows.

The Seattle Mariners acquired outfielder Jarrod Dyson from the Kansas City Royals for pitcher Nathan Karns.

The Baltimore Orioles acquired outfielder Seth Smith from the Seattle Mariners for pitcher Yovani Gallardo and cash.

The Seattle Mariners acquired pitcher Chris Heston from the San Francisco Giants for a player to be named later.

The Seattle Mariners acquired pitchers Rob Whalen and Max Povse from the Atlanta Braves for catcher/outfielder Alex Jackson and a player to be named later.

The Arizona Diamondbacks acquired pitcher Taijuan Walker and infielder Ketel Marte from the Seattle Mariners for infielder Jean Segura, pitcher Zac Curtis and outfielder Mitch Haniger.

The Seattle Mariners acquired pitcher James Pazos from the New York Yankees for pitcher Zack Littell.

The Seattle Mariners acquired infielders Richie Shaffer and Taylor Motter from the Tampa Bay Rays for pitchers Dylan Thompson and Andrew Kittredge, plus first baseman Dalton Kelly.

The Seattle Mariners acquired infielder/outfielder Danny Valencia from the Oakland Athletics for pitcher Paul Blackburn.

The Seattle Mariners acquired catcher Carlos Ruiz from the Los Angeles Dodgers for pitcher Vidal Nuno.

The Pittsburgh Pirates acquired pitcher Wade LeBlanc from the Seattle Mariners for a player to be named later.

The Seattle Mariners acquired outfielder Ben Gamel from the New York Yankees for pitchers Jio Orozco and Juan De Paula.

The Seattle Mariners acquired pitcher Pat Venditte from the Toronto Blue Jays for a player to be named later.

The Seattle Mariners acquired pitcher Arquimedes Caminero from the Pittsburgh Pirates for two players to be named later.

The Baltimore Orioles acquired pitcher Wade Miley from the Seattle Mariners for pitcher Ariel Miranda.

The Toronto Blue Jays acquired pitcher Joaquin Benoit from the Seattle Mariners for pitcher Drew Storen and cash.

The Chicago Cubs acquired pitchers Mike Montgomery and Jordan Pries from the Seattle Mariners for first baseman Dan Vogelbach and pitcher Paul Blackburn.

The Seattle Mariners acquired pitcher Wade LeBlanc from the Toronto Blue Jays for a player to be named later or cash considerations.

The Seattle Mariners acquired pitcher Zach Lee from the Los Angeles Dodgers for infielder Chris Taylor.

The Seattle Mariners acquired outfielder/infielder Patrick Kivlehan from the Texas Rangers for a player to be named later.

The Seattle Mariners acquired pitcher Nick Vincent from the San Diego Padres for a player to be named later or cash considerations.

The Seattle Mariners acquired pitcher Joe Wieland from the Los Angeles Dodgers for infielder Erick Mejia.

The Los Angeles Dodgers acquired pitcher Tyler Olson from the Seattle Mariners for a player to be named later or cash considerations.

The Seattle Mariners acquired first baseman Adam Lind from the Milwaukee Brewers for pitchers Daniel Missaki, Carlos Herrera and Freddy Peralta.

The Seattle Mariners acquired pitcher Evan Scribner from the Oakland Athletics for pitcher Trey Cochran-Gill.

The Atlanta Braves acquired pitcher Jose Ramirez from the Seattle Mariners for a player to be named later.

The Baltimore Orioles acquired infielder/outfielder Mark Trumbo and pitcher C.J. Riefenhauser from the Seattle Mariners for catcher Steve Clevenger.

The Seattle Mariners acquired infielder Luis Sardinas from the Milwaukee Brewers for outfielder Ramon Flores.

The Seattle Mariners acquired outfielder Leonys Martin and pitcher Anthony Bass from the Texas Rangers for pitcher Tom Wilhelmsen, outfielder James Jones and a player to be named later.

The Seattle Mariners acquired pitcher Joaquin Benoit from the San Diego Padres for pitcher Enyel De Los Santos and infielder Nelson Ward.

The Tampa Bay Rays acquired pitcher Danny Farquhar, first baseman Logan Morrison and infielder Brad Miller from the Seattle Mariners for pitchers Nathan Karns and C.J. Riefenhauser, plus outfielder Boog Powell.

The Chicago Cubs acquired outfielder Austin Jackson and cash from the Seattle Mariners for a player to be named later.

The Los Angeles Dodgers acquired outfielder Justin Ruggiano and cash from the Seattle Mariners for a player to be named later or cash considerations.

The Chicago Cubs acquired pitcher Fernando Rodney from the Seattle Mariners for a player to be named later or cash considerations.

The Pittsburgh Pirates acquired pitcher J.A. Happ from the Seattle Mariners for pitcher Adrian Sampson.

The Toronto Blue Jays acquired pitcher Mark Lowe from the Seattle Mariners for pitchers Nick Wells, Jake Brentz and Rob Rasmussen.

The New York Yankees acquired infielder/outfielder Dustin Ackley from the Seattle Mariners for outfielder Ramon Flores and pitcher Jose Ramirez.

The Seattle Mariners acquired outfielder Mark Trumbo and pitcher Vidal Nuno from the Arizona Diamondbacks for catcher Welington Castillo, pitcher Dominic Leone, outfielder Gabby Guerrero and infielder Jack Reinheimer.

The Seattle Mariners acquired catcher Welington Castillo from the Chicago Cubs for pitcher Yoervis Medina.

The Tampa Bay Rays acquired pitcher Erasmo Ramirez from the Seattle Mariners for pitcher Mike Montgomery.

The Seattle Mariners acquired pitcher Mike Kickham from the Chicago Cubs for pitcher Lars Huijer.

The Seattle Mariners acquired outfielder Seth Smith from the San Diego Padres for pitcher Brandon Maurer.

The Seattle Mariners acquired outfielder Justin Ruggiano from the Chicago Cubs for pitcher Matt Brazis.

The Toronto Blue Jays acquired outfielder Michael Saunders from the Seattle Mariners for pitcher J.A. Happ.

The St. Louis Cardinals acquired infielder Ty Kelly from the Seattle Mariners for pitcher Sam Gaviglio.