The Wexford heavyweight travelled to Connecticut and the Foxwoods Resort and Casino to take on New England champion Alexis Santos.
An underdog, Kennedy boxed brilliantly to claim a split decision win.
‘Boom Boom Baz’ made strong start, endured some tough middle rounds, and came on strong down the stretch. Kennedy then endured a final round charge from Santos, exhibiting an iron chin as the American looked to rescue a knockout win.
Watch Alexis Santos v Niall Kennedy in full below: