Jason Davis, the actor who voiced Mikey Blumberg on the Disney series Recess from 1997 to 2001, died Sunday in Los Angeles at age 35, CNN reports. "I am so heartbroken to share the saddest news of my life ," his mother says in a statement to the Hollywood Reporter. "Jason had a true heart of gold with such a zest for life. He was such a caring soul to everybody who ever knew him. He loved his friends and his family above all else. We ask for privacy as we take time to grieve this most devastating loss." Davis, the grandson of philanthropist Barbara Davis and late studio chief Marvin Davis, had also appeared in shows including Roseanne and 7th Heaven, had been open about his struggles with substance abuse, but had co-founded the charity Cure Addiction Now to support people working toward recovery. (More celebrity death stories.)