April 12, 2011, Big Bear,Calif. --- Three-division world champion "Sugar" Shane Mosley,Pomona,Ca. works out during a jam-packed media day at his high-altitude training compound in Big Bear,Ca. Tuesday. Mosley is in intense preparation for his upcoming World Welterweight mega fight against Superstar Manny Pacquiao on Saturday, May 7 at the MGM Grand in Las Vegas. Pacquiao vs Mosley is promoted by Top Rank in association with MP Promotions,Sugar Shane Mosley Promotions,Tecate and MGM Grand. The Pacquiao vs Mosley telecast will be available live on SHOWTIME Pay Per View. --- Photo Credit : Chris Farina - Top Rank (no other credit allowed) copyright 2011

NEW YORK (AP) — Boxer “Sugar” Shane Mosley is retiring, ending a career in which he won titles in three different weight classes, beat Oscar De La Hoya twice and never was knocked out.

The 40-year-old announced on Twitter that he was hanging up his gloves, saying he “loved every moment of it. Win, lose or draw.”

Mosley lost three of his last four fights, including a dreary bout against Manny Pacquiao in May 2011 in which he mostly seemed to be avoiding the Filipino star in the ring.

His last fight was May 5 on the undercard of the fight between Floyd Mayweather and Miguel Cotto.Mosley lost a lopsided decision to rising Mexican star Canelo Alvarez.

The loss dropped his record to 46-8-1.

Mosley began boxing at age 8 and wound up winning three U.S. Amateur titles and a bronze medal at the 1990 Goodwill Games.

His professional career peaked when he won the WBC welterweight title by beating De La Hoya in 2000 before besting the popular fighter again in 2003 to claim the light middleweight title. Mosleyalso won the IBF lightweight belt in 1997 and was chosen fighter of the year by the Boxing Writers Association of America.