John Ball
From BiblePortal Wikipedia
Cyclopedia of Biblical, Theological and Ecclesiastical Literature [1]
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.
The Nuttall Encyclopedia [2]
A priest who had been excommunicated for denouncing the abuses of the Church; a ringleader in the Wat Tyler rebellion; captured and executed.