Campbell (core injury) skated on his own Thursday morning and was downgraded from questionable by coach Claude Julien.
The Bruins are still waiting on medical clearance to determine whether forward David Pastrnak can play in either of their final two preseason games, Friday against the New York Islanders and Saturday against the Detroit Red Wings.
"I'd like to see him play and see how he handles an NHL game," Julien told the Bruins website. "Hopefully I get the news that we all want sometime today."
Forward Patrice Bergeron didn't practice Thursday, but that was termed a day off by Julien.
Introducing the new official NHL App, available for iPhone, iPad and Android smartphones and tablets. A host of new features and improved functionality are available across all platforms, including a redesigned league-wide scoreboard, expanded news coverage, searchable video highlights, individual team experiences* and more. The new NHL App on your tablet also introduces new offerings such as 60fps video, Multitasking** and Picture-in-Picture.
*Available only for smartphones
** Available only for suported iPads