Hunter Hillenmeyer

NFL Commissioner Roger Goodell arrives for football labor negotiations with the NFL Players Association involving a federal mediator, Tuesday, Feb. 22, 2011, in Washington. (AP Photo/Alex Brandon)

NFL, Union Approaching Full Week Of Mediation

When the NFL and the players’ union agreed to federal mediation, they knew it was voluntary. In theory, either side could walk away at any time. Instead, they keep coming back to the table.