FILE - At left, in an Aug. 26, 2016, file photo, Washington Redskins head coach Jay Gruden watches from the sidelines during the second half of an NFL preseason football game against the Buffalo Bills, in Landover, Md. At right, in a Sept. 11, 2016, file photo, Baltimore Ravens head coach John Harbaugh watches the action from the sidelines during the second half of an NFL football game against the Buffalo Bills in Baltimore. Gruden and Harbaugh exchanged heated words a year ago during the preseason after a rough tackle by Redskins linebacker Keenan Robinson, but any ill feelings between the two have vanished. (AP Photo/File)