The NFL sent the Las Vegas Raiders additional Jon Gruden emails to review, on top of the one that surfaced last week and others Gruden recently confirmed to ESPN, sources told ESPN's Adam Schefter on Monday.
The NFL is actively monitoring the situation and waiting to see how the team will handle the matter, sources around the league said.
The Wall Street Journal reported Friday that one of Gruden's emails from 2011 -- which came to light during the NFL's investigation of workplace misconduct with the Washington Football Team -- included a racist comment in reference to NFL Players Association executive director DeMaurice Smith.