Why MLB Legends Like Edgar Martinez And Mariano Rivera (Baseball Hall Of Famers 2019) Never Traded To Another MLB Team In Their Careers?

Since Edgar Plays As A Seattle Mariners Player And Mariano Is A New York Yankees Closer Because They Never Traded To Another MLB Team Because These Two Are The Heart And Soul Of Their Respective MLB Teams As Superstars With A Single Franchise (Not Two, Three Or Four) TRUE STORY!
Answers

The Ghost Hunter

They're very important to their franchise. They also very positive ones for their team. Mariano Rivera is the greatest closer and probably pitcher as well.