Miami Dolphins guard Richie Incognito (left) and tackle Jonathan Martin on the field during an NFL football practice in Davie, Fla., in July. Lynne Sladky/AP hide caption

itoggle caption Lynne Sladky/AP

Miami Dolphins offensive linemen Richie Incognito, left, and Jonathan Martin in July. Lynne Sladky/AP hide caption

itoggle caption Lynne Sladky/AP

Jonathan Martin, seen here during an NFL rookies' camp in 2012, allegedly received threatening texts and voice mails from teammate Richie Incognito that included racial slurs. Joel Auerbach/Getty Images hide caption

itoggle caption Joel Auerbach/Getty Images