Clark, a fan favorite on the defensive side of the ball, made waves earlier this year when he suggested that some of his former teammates in Pittsburgh used marijuana to relieve stress and physical pain.
That didn't sit well with current Steelers wide receiver Antonio Brown, who called Clark out for his comments.
"When you see things like that, it shows you how guys feel when they're not part of the team anymore," Brown said Sunday, according to the Pittsburgh Tribune-Review. "It's a form of bitterness or taking a shot at the team because you're not there anymore."
Brown didn't exactly deny the claims of marijuana use on the Steelers, but he questioned Clark's willingness to disparage former teammates in front of a national television audience.
"When you see people taking shots who were on the same team and wearing the same jerseys, that's a sign of not having that team camaraderie," Brown said. "That's something we need to get back, something we haven't had for the past two years."