"Whenever Tim Duncan retires, the San Antonio Spurs' power forward will need a wheelbarrow to cart away all of his accomplishments.He just hopes he won't need a wheelchair, too.Bruised and battered this year, Duncan is lumbering through his 14th season in unspectacular fashion.His scoring average (13.4), rebounding average (8.9) and minutes (28.4) are the lowest of his career and are telltale signs that Duncan's splendid career in about to wind to a halt.And what a career it's been for Duncan, who turns 35 on April 25."Tim's been a great ambassador of the sport,'' Dallas Mavericks center Brendan Haywood said. "In my mind he's the greatest power forward of all time. He has the numbers, the rings, the MVPs, the All-Star games, the hardware."Duncan is the only player in NBA history to be selected to the All-NBA and All-Defensive team during each of his first 13 seasons. His consistency, no-nonsense style and sheer ability to take over a game are why some declare him as the NBA's greatest power forward."