The 37-year-old was present for the start of the voluntary offseason program and reiterated his commitment to the team on Tuesday.
"I expect nothing else," Roethlisberger said of the high turnout from both younger players and veterans, according to Steelers' team writer Teresa Varley. "We want to show we are here, dedicated to this team, dedicated to having a great season. We are all about each other."
It reportedly was Roethlisberger's comments on his radio show that caused a rift between him and Brown this past season, which led to the receiver missing Pittsburgh's crucial Week 17 contest.
Bell, who joined the New York Jets, said Roethlisberger contributed to the running back's decision to leave the team.
Although the quarterback may be without two of his biggest offensive weapons this upcoming season, he doesn't appear to be missing anything while taking his first practice reps of the offseason.
"It's fun to be here first and foremost," he said. "It's fun to be out there throwing with the guys. I haven't thrown a football since the last game of the year, so to be able to get out and get some work with new guys, and guys who have been here, it's fun first."