Witherow moved to New York in 2016 and took up work in a gym, having left the University of Limerick with a master's in sports performance and obtained a graduate visa.[2] Among those to assist him was fellow expatriate Ross Wherity.[2] Witherow played at cornerback for the New York team against Sligo in the 2017 Connacht Senior Football Championship, having earlier played two challenge matches against his old side Donegal during Easter.[2]