Martin, who the NFL determined through an investigation to have been harassed by Incognito when both played for the Miami Dolphins, wrote in the note that he attempted to kill himself on multiple occasions.
"I think I'm really just concentrating on what we got going on here right now," Incognito said Thursday. "I got so much on my plate here in Buffalo, getting ready to play the biggest preseason game of the year. We're looking forward to getting Pittsburgh in here and playing against a good opponent. So that's my focus right now."
Martin announced his retirement from the NFL last month.