KANSAS CITY, Missouri, May 16, 2008 (AP) - A report that Kansas basketball star Darrell Arthur may have been ineligible to play at his Dallas high school has fueled speculation about whether he should have ever played for the national champion Jayhawks.

His former math teacher at South Oak Cliff High School told WFAA-TV in Dallas that Arthur's grades were improperly altered to show he passed math when he hadn't.

The Dallas Independent School District says it's looking into the allegations and the NCAA says it won't comment until that investigation is completed.

James Mays, Arthur's basketball coach, told the Lawrence-Journal World that the report was "totally ludicrous." He said one of Arthur's grades was changed due to teacher error.

The 6-foot-9 Kansas sophomore was key Kansas' road to the national championship, finishing second in scoring at 12.8 points a game and second in rebounding. He had 20 points and 10 rebounds in Kansas' national title win against Memphis.

Arthur has applied for early entry into the NBA draft.

KU associate athletic director for external affairs Jim Marchiony said he believes that the investigation into Arthur will not affect the school's basketball program. He said that because

the NCAA declared Arthur eligible, Kansas would not have known about any grading problems in high school.