Major League Baseball has found no links between Texas Rangers right-hander Yu Darvish and the alleged illegal gambling activities of his younger brother, Sho, in Japan, a source said on Saturday.

Sho Darvish was arrested in Osaka in October after a police investigation of more than one year and charged a month later with gambling and operating a ring that took bets on Major League Baseball and Nippon Professional Baseball games.

Yu Darvish was never accused of involvement in his brother's alleged operation. MLB has been following its standard protocols for any investigation involving alleged gambling on its games, a spokesman previously said.

In a statement issued by his representatives with the Wasserman Media Group, Darvish had denied involvement with gambling at any time.

"While I understand that Major League Baseball must conduct an investigation, I am certain that they will find that I had no involvement in this matter whatsoever," Darvish said.

According to The Japan Times, which first reported the story, Sho Darvish allegedly took in about 1,850 wagers at about 10,000 yen ($85 in U.S. currency) on games in MLB and Nippon Professional Baseball. There is no indication Sho Darvish took bets on Rangers games.

MLB consistently investigates suggestions of anyone in the game involved with gambling. In the last two years, Pittsburgh pitcher Jeff Locke was cleared after allegations surfaced, and Miami pitcher Jarred Cosart was fined for placing illegal bets on sports other than baseball.

The anti-gambling Rule 21 is prominently posted in every major league clubhouse. The rule can be interpreted as consorting with gamblers and passing along information. Commissioner Bowie Kuhn suspended Hall of Famers Mickey Mantle and Willie Mays in 1983 after they took jobs with casinos in Atlantic City. N.J. Commissioner Peter Ueberroth lifted the suspension in 1985.

Sho Darvish has had a previous brush with the law. He received a one-year suspended sentence in the Osaka District Court in 2012 for assaulting a female acquaintance.