In his book, "Greatest Team Ever: The Dallas Cowboys Dynasty of the 1990s", author Norm Hitzges chronicled the Herschel Walker trade. Four games into the 1989 season, Jimmy Johnson, then the new head coach of the Dallas Cowboys (having taken over for Tom Landry that season), came up with the idea to trade Walker while on a morning jog with his staff. Johnson felt the Cowboys were so terrible that only a blockbuster trade could help them. He briefly considered trading wide receiver Michael Irvin to the Los Angeles Raiders, but Raiders owner Al Davis essentially talked Johnson out of the trade by saying, "You sure you want to do that? Who is going to catch passes for you?" Johnson felt that Walker was the only remaining bargaining chip they had.