Perez tested positive for the banned anabolic steroid oxandrolone at the Games.

The 30-year-old was part of the Dominican Republic team which finished fifth in the men’s baseball competition here.

Dominican Republic finished third in their group after a victory over Peru, but suffered defeats to Puerto Rico and Nicaragua.

Their team then overcame Cuba 10-9 in the fifth-place playoff.

Dominican Republic will not lose their finishing position with two positive tests required for a team to be disqualified from the competition.

Perez, a former catcher for the St Louis Cardinals in Major League Baseball, had his accreditation immediately withdrawn after the failed test.

Panam Sports Medical Commission, chaired by Bernardo Chernilo, say Perez is the sole positive from tests carried out to date by the organisation.

A total of 1,197 anti-doping controls have been carried out to date, with 670 were taken in competition and 527 out of competition.

This is claimed to be the one of the largest amounts of samples taken in the history of the Games.

"Faced with the potential for more positive cases in the final days of competition, or those that are still under review, Panam Sports is committed to providing information as soon as cases are confirmed and all due process has been complied with according to our standards and regulations," Panam Sports said.

Earlier in the Games, Peruvian swimmer Mauricio Fiol confirmed he had been ruled out of competition after being informed of a positive test by the International Swimming Federation.

It was the second consecutive Pan American Games he had been embroiled in a doping case.

Fiol was stripped of the silver medal he won in the 200 metres butterfly at Toronto 2015 after testing positive for the banned steroid stanozolol.

This led to the Peruvian being been banned for four years, which ran from July 12, 2015 and officially ended on July 11, 2019.

Stanozolol was also the substance the Peruvian tested positive before Lima 2019.

Chilean equestrian athlete Mauricio González was confirmed to have been left out of the country’s delegation before the Games.

The Chilean Olympic Committee announced his positive test for marijuana on July 26.

The positive was reportedly after an internal test from the Chilean Equestrian Federation.

Chile had already been forced to remove cyclists Constanza Victoria Paredas Martinez and Andreas Silva Zambrano last month from their team following positive tests.

The last Pan American Games in Toronto saw 20 athletes implicated in doping cases.