Jaramillo also had the longest tenure with one team as a hitting coach in Major League Baseball (MLB).

In 1990, Jaramillo joined the Houston Astros coaching staff after Art Howe was named the team manager.

Prior to the 1995 season, Jaramillo was named as the Texas Rangers' major league hitting coach.

[3] While Jaramillo was credited with the development of young Cubs phenom Starlin Castro, he was dismissed by the team on June 12, 2012.

He was the 2004 recipient of the Texas Rangers' Joe Macko Award, given to honor his long and meritorious service to the organization.

[citation needed] In 2005, Baseball America named Jaramillo Major League Coach of the Year.