Ball, John a Roman priest, who seems to have imbibed Wickliffe's doctrines, and who was (previously to 1366) excommunicated repeatedly for preaching "errors, and schisms, and scandals against the pope, archbishops, bishops, and clergy." He preached in favor of the rebellion of Wat Tyler, and was executed at Coventry in 1381. See Collier, Eccl. Hist. 3, 148 sq.