Back when they were playing, they were reportedly the best of frenemies. 

Jeter was not too fond of A-Rod. 

Many players reached out with congratulations for Jeter on his induction, but there might not be anybody it could mean less from than his longtime New York Yankees teammate, Alex Rodriguez.

RELATED:  Derek Jeter Missed Out on Unanimous First Ballot Hall of Fame Selection by One Vote

The two held things down on the left side of the diamond together for a decade, winning the World Series in 2009.

Rodriguez took to Instagram with a lengthy, heartfelt message for Jeter upon his reaching the Hall of Fame. 

Flip the Page to see the message: