Rick Fox retired yesterday, ending a 13-year pro career during which he was part of three NBA championship teams with the Los Angeles Lakers.

Fox, beset by injuries last season, was traded by the Lakers to the Celtics on Aug. 6. It had been expected he would retire rather than report to Boston's training camp beginning Monday.

The Celtics, who were aware of Fox's injuries when they made the trade, waived him yesterday to facilitate his retirement.

The 35-year-old forward averaged a career-low 4.8 points last season, when the Lakers were beaten by Detroit in the NBA Finals.

Fox was bothered by foot, neck and back injuries that limited him to 38 games. He spent the summer rehabilitating, but never fully recovered, his spokeswoman Staci Wolfe said.

Fox plans to remain in Los Angeles and continue an acting career he developed during his playing days.

* COURTS: A judge has rejected requests to unseal the grand jury investigation of the sex-and-alcohol scandal surrounding the University of Colorado football program, saying he could only release the report had no indictment been returned.

The sprawling investigation of the scandal resulted in a single indictment against a former football recruiting aide, Nathan Maxcey. He is charged with misdemeanor solicitation and two felonies: embezzlement of public property and theft, both related to allegations he used a school cell phone to call a dating chat line. Maxcey has said he used a university-issued cell phone to call an escort service but that the calls were to arrange liaisons only for himself.

* TENNIS: Andy Roddick needed seven match points before finally putting away Jeff Morrison, 6-2, 6-7 (7-4), 6-4, to reach the Thailand Open quarterfinals in Bangkok.

The second-seeded Roddick's next opponent is 2002 Australian Open champ Thomas Johansson, who beat Chile's Adrian Garcia, 6-3, 6-3. . . .

Tim Henman pulled out of France's Grand Prix de Lyon, which starts on Monday, because of a shoulder injury. . . .

Olympic champion Justine Henin-Hardenne pulled out of next week's Porsche Grand Prix in Germany because she is still ill from a virus which sidelined her earlier this year.

* BUSINESS: International Management Group, a leading sports and celebrity management and marketing firm that has represented athletes such as Tiger Woods, Joe Montana and Derek Jeter, is being sold to funds assembled by a New York buyout specialist firm for an undisclosed sum. Forstmann Little & Co. was the leading bidder for control of IMG, a Cleveland-based privately held firm, both organizations announced.

-- From News Services