​The longest-tenured coach in San Diego Padres history, Rob Picciolo, passed away suddenly at the age of 64 on Wednesday. 

The cause of death has not been confirmed, despite initial reports that he'd died of a heart attack. Picciolo's family has refuted those claims.

Picciolo spent 20 years in the Padres organization, including a 16-year stretch where he was San Diego's first base coach (1990-1992), bench coach (1993-2002) and third base coach (2003-2005).

He also spent eight years in the Los Angeles Angels organization from 2006-2013 as an instructor.

A remarkably tough few weeks for fans of both organizations, following the sudden passing of Dick Enberg a few weeks prior.

“There are certain individuals you meet in life & respect because they ‘just get it,’” Tim Mead, vice president of Angels communications, tweeted late Wednesday night. “Their daily outlook is filled with optimism, laughter, caring & compassion. And they are always open to sharing those traits with others. #RIPPeach”

Picciolo played for three different organizations, including the Oakland A's, Milwaukee Brewers and California Angels, over nine big league seasons. The versatile infielder finished his career with a slashline of .234/.246/.312 and 17 home runs.