In the nation’s capital, where deal-making is a way of life and the Redskins are something close to a state religion, the negotiations over the sale of the ‘Skins was a once-in-a-career adventure for attorney Tom McCormick, of Washington, D.C.’s ShawPittman.

The $800 million sale of the Redskins by the estate of Jack Kent Cooke to Dan Snyder, who was represented by ShawPittman, was uniquely complicated and challenging, said Mr. McCormick, who heads the corporate group at ShawPittman, overseeing mergers, acquisitions and security offerings.