Milwaukee Brewers first baseman Prince Fielder could owe a sizeable sum to the IRS in back taxes, according to a published report. ((Darren Hauck/Associated Press))

Milwaukee Brewers first baseman Prince Fielder owes more than $400,000 US in unpaid taxes, according to a published report.

Prior to his game against the Toronto Blue Jays on Wednesday, Fielder declined to comment on the report from Tuesday's edition of the Detroit News' Tax Watchdog blog.

An IRS spokesman told the Associated Press that Fielder could have made payments or paid it off and it simply hasn't been recorded yet.

The blog published a copy of the IRS' Notice of Federal Tax Lien filed against Fielder on Oct. 6, 2005. The lien was addressed to Fielder's residence in Melbourne, Fla., and noted he owed a total of $409,149.14 assessed on Sept. 13, 2004, and Feb. 7, 2005.

Brewers general manager Doug Melvin declined to comment on the report, while manager Ned Yost would only comment on the private nature of the matter.

"That's nobody's business but his," Brewers manager Ned Yost said. "That has nothing to do with baseball."

Fielder's agent, Scott Boras, wasn't immediately available for comment.

Fielder, 24, was the Brewers top pick in the 2002 draft and received a $2.4 million signing bonus.

After leading the National League in home runs (50) with 119 RBIs last season, Fielder attempted to negotiate a long-term deal with Milwaukee.

The two sides failed to reach an agreement and a disappointed Fielder was forced to settle for a one-year deal worth $670,000. He will be eligible for salary arbitration next year.

Fielder is batting .285 with 12 home runs and 35 RBIs in 69 games this season.

With files from the Associated Press