Stewart Teggart, a manager who work with bands including Bad Religion, Pennywise, Therefore I Am, Blessthefall, and Greeley Estates has died following a heart attack.

Therefore I Am guitarist Brian Marquis told AltPress.com that “We are all shocked and saddened by the passing of our friend Stewart Teggart. He was more than a manager to us. He was like a bad-ass uncle who taught us all how to fight.”

“Stew is responsible for the best summer of our lives on Warped Tour this past summer. Our condolences go out to Judi Teggart who is the sweetest person you’ll ever meet and all their family. Anyone who knew Stew would know that he wouldn’t want us all getting soft and crying about him so for all of you: ‘Taste bro, taste.’”

Although not widely known outside the industry, Stewart Teggart was highly regarded by others who worked with him.