The whistle blows and the National Football League's legal team, led by associate counsel Dolores DiBella, takes the field. Today it is defending against an onslaught of rogue websites selling counterfeit NFL jerseys and other products.

DiBella, joined by Nancy Wygand, senior trademark and digital rights manager for the NFL, and Ryan Tucker, a manager at MarkMonitor Inc., offered a webinar recently explaining how they are tackling the problem as counterfeiters grow ever more sophisticated.