Brazilian swimmer Joao Gomes Jr. gets 6-month doping ban foxsports Feb 28, 2015 at 9:32a ET RIO DE JANEIRO (AP) Brazilian swimmer Joao Gomes Jr. has been banned for six months for a ”doping rule violation” by swimming’s world governing body FINA. Gomes tested positive for a banned diuretic at the short-course world championships in December in Doha, Qatar. Diuretics can be used as masking agents to hide the presence of other drugs. FINA said Gomes’ results were ”annulled,” which includes results at the world championships. Article continues below ... Gomes was part of three gold-medal winning relay teams, though he swam only in heats. Brazil topped the gold-medal table in Doha, but will lose that position with Hungary moving to the top. The ban, which runs through June 3, 2015, could be an embarrassment to Brazil which will hold the 2016 Rio de Janeiro Olympics and is an emerging power in swimming.