Per NFL spokesman Brian McCarthy, via NFL Network's Ian Rapoport, the league talked with Gruden, Raiders general manager Reggie McKenzie and owner Mark Davis about the hiring process and noted the Raiders interviewed tight ends coach Bobby Johnson and USC offensive coordinator Tee Martin.
ESPN's Adam Schefter reported Jan. 12 that the NFL was looking into whether or not the Raiders violated the Rooney Rule after the Fritz Pollard Alliance expressed concern over the process of interviewing minority candidates.
ESPN's Josina Anderson reported Jan. 8 that Martin was the second minority candidate interviewed by the Raiders before they hired Gruden, though the report doesn't specify when Martin's interview took place.
Davis said at Gruden's introductory press conference Jan. 9 the two sides solidified an agreement on Christmas Eve, per Michael David Smith of Pro Football Talk.
The Rooney Rule was established in 2003 to give minority candidates an equal opportunity when teams hire head coaches and other management positions.