Japhet Amador, the power hitting first baseman of the Charros de Jalisco and a current player for the Rakuten Eagles, has been suspended by the Nippon Professional Baseball League in Japan.

Amador underwent a drug test on June 13 following a game against the Chunichi Dragons. He tested positive for the chlorthalidone and furosemide, two substances included under diuretics and masking agents on a list of prohibited drugs on the World Anti-Doping Agency’s Web site.

Amador was informed of the test results on June 23 and given a chance to defend himself. He denied knowingly or intentionally taking any banned substance. The league retested his sample, at Amador’s request, on August 1. The results were the same.

“I have never committed an act of doping in my baseball life up to this point,” Amador said in a statement released by the Eagles. “I have never intentionally taken any banned drugs.

“I haven’t used stimulants or anything to increase muscle, or thought about using diuretics or masking agents. I’ve been given many doping tests in the past and they’ve all been negative.”

In a tweet August 9, Amador announced the results of the test saying that he “assumes responsibility” and that he would soon “announce his retirement.”

In an 11-year career, Amador has hit 312 home runs and driven in 1,057 runs while hitting for a .296 average. In three years with the Rakuten Eagles of the Nippon League, Amador hit .250 with 52 homers.

In four years with the Charros, Amador drove in 145 runs while hitting 40 home runs.

Amador, a one-time product of the Houston Astros organization, “El Gigante” from Mulege, Mexico, played for Oklahoma City of the Pacific Coast League and Peoria for the Arizona fall League.