Major League Baseball will not mediate in the dispute over outfielder Kevin Millar, a new Chunichi Dragons acquisition who has refused to report to spring training in an attempt to play for the Boston Red Sox, the Boston Globe reported Saturday.

"As far as our office is concerned, it remains a matter between the signed player and the Japanese club," the daily quoted MLB spokesman Patrick Courtney as saying, noting that the MLB is not accepting Millar's claim.

The report came on a day when spring training began in Japanese baseball, three weeks after Chunichi announced the acquisition of Millar from the Florida Marlins on a two-year contract.