The first half was goalless and it took until the 69th minute before Theo Bongonda gave Cadiz the lead.
Theo Bongonda, again, increased Cadiz’s lead on a penalty in the 76th minute. That settled the final score at 2-0.
In the 80th minute, Valladolid had Martin Hongla sent off, and had to play with a man less for the last ten minutes.
Cadiz has two wins and three losses and a 5-8 goal difference in the last five matches, while Valladolid has five losses and a 4-14 goal difference.
With three rounds remaining, Cadiz is 14th in the table, while Valladolid is 17th.
The next opponent for Cadiz is Villarreal. The teams meet on Wednesday 24 May 19.30 at the Estadio de la Ceramica. Valladolid take on Barcelona at home on Tuesday 23 May 22.00.