WALTHAM, Mass. -- Despite coach Doc Rivers' best attempts to keep it under wraps, word slipped at the Celtics' practice Friday that JR Giddens is penciled in to start Saturday's game against the Raptors.

While both Rivers (without naming the player) and Giddens admitted that decision is subject to change, it appears the 2008 first-round draft pick (30th overall) with just 69 total minutes of career action, will be thrust into the starting role with Boston playing without three starters in Kevin Garnett, Paul Pierce, and Rajon Rondo.

"It's a dream come true," said Giddens, who jokingly prayed that Rivers wouldn't change his mind. "I've been working hard --working and working -- I have to go out and get it done now. Me getting this chance, it's probably the biggest chance in my NBA career. I don't even know to describe it in words."

Giddens planned to return to the Sports Authority Training Center Friday night to get in some extra shots and a run -- but stressed he didn't want to overdo it on the eve of his big chance.

"You've all seen me for last year and all of this season -- I'm anxious to get out there, share my gift with the world," said Giddens.

Rivers pulled his youngest players -- Giddens, second-year forward Bill Walker, and rookie guard Lester Hudson -- into his office Friday morning and made the announcement that Giddens would work with the first team. He also stressed how all three players must step up with Boston battling injuries.

In 21 career games, Giddens has logged 20 points and 14 rebounds. He's never played more than eight minutes in any appearance and never scored more than four points in a game.