Celso Fabián Ortiz Gamarra (born 26 January 1989) is a Paraguayan professional footballer who plays as a midfielder for Liga MX club Pachuca.

On 26 August 2009, AZ Alkmaar secured the services of the Paraguayan football midfielder.

[2] The Dutch club have signed him from Cerro Porteño on a five-year deal.

[3] On 6 June 2016, Monterrey coach Antonio Mohamed announced that Ortiz would be their first signing ahead of the Apertura 2016.

[6] He was selected in the final 23-man squad for the 2019 Copa América, playing the full 90 minutes in the quarterfinal loss against host Brazil.