(CBS/AP) LAKE FOREST, Ill. - Chicago Bears receiver Brandon Marshall criticized former NFL star Warren Sapp for calling him a "retard" in a radio interview.
That struck a chord with Marshall, who has acknowledged receiving treatment for borderline personality disorder and anger management, and he fired back Monday in an online video.
"I got a really disturbing heads-up on something Warren Sapp said, called me retarded. That's really disappointing to hear that from an NFL legend, but I'm going to take this as a lesson, and I think we all can learn from this," Marshall said in the video posted online. "Be very careful who you take advice from. You want to surround yourself with good people, godly people. When I look at Warren Sapp, I can't go to him and talk about finances because he. I can't go to him and talk about my marriage because he filed for divorce. I can't go to him and talk about being a father because one day I'm going to have children, because he's not active in his children's life."
Marshall later posted on Twitter that he received an e-mail from Sapp asking "where and when" and that he assumed he was being challenged to a fight.
All that stemmed from an interview with the outspoken Sapp, an NFL Network analyst, on the syndicated "The Dan Patrick Show." He was criticizing today's players in general, saying they have "no relevance for the past, have no conscious of what it is" when he blasted Marshall.
"I mean Brandon Marshall talking about Shannon Sharpe ... `Who is he to talk?"' Sapp said. "He's the first 100-catch receiver (tight end) back to back, retard. What you just did in Denver for three years. You don't know this? Of course he doesn't because it's not about Brandon Marshall. It ain't about the past, it's about me because it's about personal success, pay me and now I'll think about being a team guy."
It appeared Sapp was actually referring to NFL analyst Sterling Sharpe, Shannon's brother, who questioned Marshall's effort in the Dolphins' loss to the New York Jets a year ago. Marshall responded at the time, saying the commentators need to stop worrying about stuff they know nothing about.
, Marshall talked to Charlie Rose and Gayle King on "CBS This Morning" about being diagnosed with borderline personality disorder and how he finished the 2011 season as MVP of the Pro Bowl. (Watch interview at left).
Marshall admitted that, initially, he was defensive about getting treatment.
"I didn't know what was going on," Marshall said. "At first, it was pointing the finger at everyone else. And it wasn't until this past off-season that I finally recognized (the issues), got the proper help (after realizing) that there was some things that I needed to change and work on."
Marshall said he lived up to his nickname "The Beast," both on the field and off. "There was a lot of isolation, there was some depression. I couldn't regulate my emotions," he said.