Black bears are responsible for more attacks. Proportionally grizzlys are more aggressive, but there are a hell of a lot more black bears.
The “wild” black bears around here do everything they can to sneak off and avoid contact with humans. The suburban black bears are another story.
http://www.sfgate.com/news/article/Behemoth-bruin-terrorizes-Incline-Village-homes-3276299.php
In any case sad for the guys family.