The 19 year-old winger joins Houston from Colombian side Once Caldas. The Houston Dynamo have officially announced the signing of 19 year-old Colombian winger Nelson Quiñones from Once Caldas in Colombia. Quiñones joins the club on loan with an option to purchase. He will join the club once he receives his P-1 Visa. He will occupy a senior and international roster spot. Quiñones joins the Dynamo after two seasons with Once Caldas. He appeared in 31 matches with the club after graduating from their academy system. “We are excited to welcome Nelson to Houston Dynamo FC. He is a dynamic…