May 31, 2019

• The Seattle Mariners claimed RHP Ruben Alaniz off waivers by Cincinnati.

May 30, 2019

• The Milwaukee Brewers signed RHP Anthony Bender to a minor league contract.
• The San Francisco Giants signed RHP Adam Oller to a minor league contract.
• The Washington Nationals signed LHP Jonny Venters to a minor league contract.

May 28, 2019

• The Detroit Tigers signed RHP Carlos Torres to a minor league contract.
• The Oakland Athletics released RHP Fernando Rodney.

May 27, 2019

• The Baltimore Orioles traded RHP Yefry Ramirez to Pittsburgh for a player to be named or cash.
• The Cleveland Indians released OF Carlos Gonzalez.
• The New York Yankees signed RHP Randall Delgado to a minor league contract.
• The Seattle Mariners claimed RHP Jimmy Cordero off waivers from Toronto and assigned him to Tacoma (PCL).

May 26, 2019

• The Detroit Tigers claimed RHP Austin Adams from Minnesota.

May 25, 2019

• The Washington Nationals acquired RHP George Kontos' contract from Long Island (AL).

May 24, 2019

• The Los Angeles Dodgers traded 3B Mike Ahmed to Seattle for cash.
• The New York Mets signed RHP Ervin Santana and OF Matt Kemp to a minor league contract.

May 23, 2019

• The Minnesota Twins released RHP Addison Reed.
• The New York Mets claimed OF Aaron Altherr off waivers from San Francisco.
• The San Francisco Giants signed RHP Keith Weisenberg to a minor league contract.
• The Toronto Blue Jays signed LHP Buddy Boshers to a minor league contract. Claimed LHP Zac Rosscup off waivers from Seattle.

May 22, 2019

• The Baltimore Orioles claimed RHP Chandler Shepherd off waivers from the Chicago Cubs and optioned him to Norfolk (IL).
• The Minnesota Twins released RHP Addison Reed.
• The New York Mets traded OF Keon Broxton to Baltimore for international bonus pool money.
• The Washington Nationals announced LHP Dan Jennings elected free agency.

May 21, 2019

• The Seattle Mariners signed RHP Anthony Bass to a one-year contract.
• The St. Louis Cardinals released RHP Luke Gregerson.

May 20, 2019

• The Atlanta Braves traded RHPs Arodys Vizcaino and LHP Jesse Biddle to Seattle for RHP Anthony Swarzak.
• The Tampa Bay Rays sent RHP Matt Seelinger to San Francisco to complete an earlier trade.
• The Texas Rangers announced Rule V selection RHP Reed Garrett was returned by Detroit and assigned to Nashville (PCL).
• The Washington Nationals claimed RHP Javy Guerra off waivers from Toronto.

May 19, 2019

• The Atlanta Braves released LHP Jonny Venters.
• The Kansas City Royals released 1B Frank Schwindel.
• The Oakland Athletics signed C Cameron Rupp to a minor league contract.
• The San Francisco Giants signed 3B Zach Houchins to a minor league contract.

May 18, 2019

• The Chicago Cubs claimed RHP Chandler Shepherd off waivers from Boston and optioned him to Tennessee (SL).

May 17, 2019

• The Seattle Mariners claimed RHP Andrew Moore off waivers from San Francisco and assigned him to Arkansas (TL).

May 16, 2019

• The Boston Red Sox signed RHP Dylan Thompson to a minor league contract.
• The San Francisco Giants traded C Erik Kratz and cash considerations to the Tampa Bay Rays for a player to be named later or cash considerations.

May 15, 2019

• The Baltimore Orioles added RHP Evan Phillips from Norfolk (IL) and returned him after Wednesday's doubleheader.
• The New York Yankees added 1b/DH Kendrys Morales. Returned OF Mike Tauchman to Scranton/Wilkes-Barre.
• The Toronto Blue Jays claimed RHP Jimmy Cordero off waivers from Washington.
• The Washington Nationals signed RHP Bryan Bonnell to a minor league contract.

May 14, 2019

• The New York Yankees added OF Mike Tauchman as 26th man for Wednesday's doubleheader. Acquired 1B/DH Kendrys Morales and cas considerations from the Oakland Athletics for a player to be named later or cash considerations.
• The Washington Nationals signed RHP Michael Blazek to a minor league contract.

May 13, 2019

• The New York Mets sent RHP Neraldo Catalina to Tampa Bay to complete an earlier trade.

May 12, 2019

• The Los Angeles Angels released OF Peter Bourjos.

May 11, 2019

• The Cleveland Indians announced INF Max Moroff cleared waivers and was assigned outright to Columbus.
• The Pittsburgh Pirates acquired RHP Chris Stratton from the Los Angeles Angels for cash considerations.
• The San Francisco Giants claimed OF Aaron Altherr off waivers from Philadelphia.
• The Toronto Blue Jays acquired RHP Edwin Jackson from Oakland for cash considerations.

May 9, 2019

• The New York Yankees signed LHP Nestor Cortes, Jr. and selected him to the 25-man roster.
• The Washington Nationals agreed to terms with OF Gerardo Parra on a one-year contract.

May 8, 2019

• The Pittsburgh Pirates announced OF JB Shuck cleared waivers and was assigned outright to Indianapolis (IL).

May 7, 2019

• The San Francisco Giants announced OF Gerardo Parra refused his outright assignment to Sacramento an elected free agency.

May 6, 2019

• The New York Mets acquired RHP Wilmer Font from Tampa Bay for a player to be named or cash.

May 4, 2019

• The Cincinnati Reds released OF Matt Kemp.
• The Los Angeles Angels appointed INF Taylor Ward as the 26th man.
• The Seattle Mariners announced INF Joey Curletta was claimed by Boston (AL). Acquired RHP Austin Adams from Washington for LHP Nick Wells and cash considerations.

May 2, 2019

• The San Francisco Giants acquired C Francisco Pena from St. Louis Cardinals for cash considerations and assigned him to Sacramento (PCL).
• The Washington Nationals fired pitching coach Derek Lilliquist. Named Paul Menhart pitching coach.