Chicago Cubs catcher Willson Contreras has only had one manager during his big league career, and as Joe Maddon rides into the sunset, he penned an emotional tribute to the man he called "socio." 

Maddon, who will leave the Cubs after five seasons, leaves a strong track record behind, with a World Series title and four playoff appearances to his credit. 

Contreras was a key member of three of those playoff teams, including the 2016 squad, and he thanked Maddon for his role in bringing a championship to Chicago: 

"Socio, it was my pleasure to play for you and I cannot thank you enough," Contreras said. "Was really special to have you as my first MLB manager. Thanks for all the advice that I will never forget. You will always be remembered everywhere, but the city of Chicago will always love you." 

Contreras was the Cubs' starting catcher in Game 7 of the 2016 World Series, going 1-for-2 with an RBI before being removed in favor of catcher David Ross later in the contest. 

The Cubs have already launched their search for their next manager, and Ross is one of the candidates they are potentially targeting, according to Cubs President of Baseball Operations Theo Epstein.