[1][2] Déniz grew up in sports under the guidance of José Carlos Hernández Rizo and Paco García on the Tenerife CB's bench.
However, in June 2007, Déniz surprised with an unusual signing by the Soles de Mexicali, a team that hired him for one season with an option for an additional year.
At the end of 2012, the Atléticos de San Germán from Puerto Rico confirmed that Déniz would be their head coach starting in March 2013.
Currently, he reached a contractual agreement to coach the Venezuelan team Guaros de Lara in the 2016 season of the Professional Basketball League (LPB).
His first challenge as coach of this club would be none other than the FIBA Intercontinental Cup final, scheduled for September 18, 2016, where he would face the Fraport Skyliners of Frankfurt.