- Aug 30th – Chicago Cubs acquire designated hitter Jose Martinez from the Tampa Bay Rays for two players to be named later.
- Aug 30th – Boston Red Sox first baseman Mitch Moreland has been traded to the San Diego Padres for prospect outfielder Jeisson Rosario and prospect third baseman Hudson Potts.
- Aug 29th – San Diego Padres acquire closer Trevor Rosenthal form the Kansas City Royals. Kansas City receives outfielder Edward Olivares and a player to be named later.
- Aug 28th – Los Angeles Angels trade infield utilityman Tommy La Stella for Oakland Athletics middle infielder Franklin Barreto
- Aug 28th – Chicago White Sox trade for Jarrod Dyson of the Pittsburgh Pirates. The Pirates receive international bonus pool money in return.
- Aug 27th – Tampa Bay Rays acquire outfielder Brett Phillips from the Kansas City Royals for shortstop prospect Lucius Fox.
- Aug 27th – Toronto Blue Jays acquire starting pitcher Taijuan Walker from the Seattle Mariners. Mariners receive a player to be named later.
- Aug 21st – Philadelphia Phillies trade for Boston Red Sox closer Brandon Workman and relief pitcher Heath Hembree. The Red Sox receive starting pitcher Nick Pivetta and pitching prospect Connor Seabold.