The trade marks a quiet end to a winning-era for the team, and Blue Jays fans took to Twitter to say good bye to the 2015 American League MVP.
Here are some of the best reactions.
Really feeling emotional seeing all these Donaldson gifs everyone is posting. It's not like when Edwin left, which really signaled the end of that era, but it's kind of the final piece.
So many great memories. I was there at the dome for the Bat Flip and the Donaldson Dash
— King Henry the 9th (@DrCoolSexy) September 1, 2018