May 31, 2017

• The St. Louis Cardinals released RHP Jonathan Broxton.

May 30, 2017

• The Chicago White Sox agreed to terms with RHP Jake Johansen on a minor league contract.

May 27, 2017

• The Chicago White Sox agreed to terms with OF Luis Robert on a minor league contract.
• The Milwaukee Brewers agreed to terms with OF/1B Ernesto Martinez Jr. on a minor league contract.
• The Texas Rangers claimed OF/1B Peter O'Brien off waivers from Cincinnati and optioned him to Round Rock.

May 26, 2017

• The Seattle Mariners announced INF Mike Freeman and RHP Chris Heston were claimed off waivers by the Los Angeles Dodgers.

May 25, 2017

• The Cincinnati Reds claimed RHP Jake Buchanan off waivers from the Chicago Cubs.

May 24, 2017

• The Baltimore Orioles released OF Michael Bourn.
• The Houston Astros traded OF Andrew Aplin to Seattle for cash or a player to be named.

May 23, 2017

• The Cleveland Indians agreed to terms with OF David Lough on a minor league contract.
• The Colorado Rockies agreed to terms with OF Stephen Cardullo on a minor league contract.

May 22, 2017

• The Atlanta Braves released 1B James Loney from his minor league contract.

May 21, 2017

• The Chicago White Sox traded LHP Alex Katz to Baltimore for two international bonus pool slots.
• The Cincinnati Reds agreed to terms with RHP Vin Mazzaro on a minor league contract.
• The Detroit Tigers agreed to terms with OF Matt den Dekker on a minor league contract.
• The San Diego Padres claimed INF Chase d'Arnaud off waivers from Boston.

May 20, 2017

• The Atlanta Braves acquired RHP Enrique Burgos from Arizona for cash considerations. Acquired 1B Matt Adams from St. Louis for INF Juan Yepez and cash.
• The Los Angeles Angels signed RHP Doug Fister and optioned him to Inland Empire (Cal).

May 19, 2017

• The Pittsburgh Pirates claimed RHP Jhan Marinez off waivers from Milwaukee.

May 18, 2017

• The Atlanta Braves signed 1B James Loney to a minor league contract.
• The Cleveland Indians traded 2B Michael Martinez to Tampa Bay for cash.
• The Toronto Blue Jays suspended OF Kevin Pillar two games for yelling an anti-gay slur at a Braves pitcher.

May 17, 2017

• The Cincinnati Reds claimed 1B/OF Peter O'Brien off waivers from Kansas City at optioned him to Louisville (IL).

May 16, 2017

• The Miami Marlins claimed INF Christian Colon off waivers from Kansas City.
• The New York Mets agreed to terms with RHP Neil Ramirez.
• The Pittsburgh Pirates agreed to terms with RHP Hai-Cheng Gong.
• The Texas Rangers agreed to terms with OF Drew Stubbs on a minor league contract.

May 14, 2017

• The Seattle Mariners announced RHP Jean Machi cleared waivers and was sent outright to Tacoma (PCL).

May 13, 2017

• The Washington Nationals agreed to terms with RF Bryce Harper on a 2018 contract.

May 12, 2017

• The Seattle Mariners claimed RHP Casey Lawrence off waivers from Toronto.

May 11, 2017

• The Philadelphia Phillies extended the contract of manager Pete Mackanin through next season.

May 10, 2017

• The Minnesota Twins claimed LHP Adam Wilk off waivers from the New York Mets.
• The San Diego Padres claimed RHP Jose Valdez off waivers from the Los Angeles Angels and optioned him to El Paso (PCL).

May 9, 2017

• The Los Angeles Dodgers claimed LHP Justin Marks from Tampa Bay and assigned him to Oklahoma City (PCL).
• The Seattle Mariners traded RHP Casey Fien to Philadelphia for cash considerations. Acquired RHP Bryan Bonnell from the Tampa Bay for the International Signing Slot No. 71.

May 8, 2017

• The Atlanta Braves traded for LHP Kevin Chapman and cash considerations to Minnesota for INF/OF Danny Santana. Released 1B Ryan Howard from his minor league contract.
• The Chicago Cubs acquired RHP Justin Hancock from San Diego for OF Matt Szczur.

May 7, 2017

• The New York Mets suspended RHP Matt Harvey three days for a violation of team rules. Claimed LHP Tommy Milone off waivers from Milwaukee.

May 6, 2017

• The Los Angeles Angels acquired RHP Damien Magnifico from Baltimore for RHP Jordan Kipper and optioned him to Salt Lake (PCL).

May 5, 2017

• The New York Yankees acquired RHP Yoiber Marquina from Cleveland to complete an earlier trade.
• The Oakland Athletics announced RHP Cesar Valdez was claimed off waivers by Toronto.
• The Texas Rangers traded C Pat Cantwell to Toronto for a player to be named or cash considerations.