José Manuel Fontán Mondragón is a Spanish footballer who plays for Celta de Vigo as either a left back or a central defender. Born in Vilagarcía de Arousa, Pontevedra, Galicia, Fontán joined RC Celta de Vigo's youth setup in 2011, after representing Arosa SC and UD San Miguel de Deiro. He made his senior debut with the reserves on 14 October 2018, coming on as a late substitute for Diego Alende in a 0–3 Segunda División B away loss against Atlético Madrid B. Fontán made his professional debut for Celta on 23 January 2020, starting in a 1–2 loss at CD Mirandés, for the season's Copa del Rey.