Before his first appearance as an MP, Cager was employed by successive sheriffs of Surrey and Sussex to assist them in their duties. In July 1455 he appeared as an attorney in the Exchequer for the former sheriff John Devenish* who had allegedly failed to pay (Sir) Roger Lewknor* the sum due to him as wages as a knight of the shire in the Parliament of 1453-4,
Nothing is known of Cager after 1481, and it is possible that he died before Easter 1482 when he was replaced as the abbot of Westminster’s bailiff.
