The first step in the massive rebuilding of the Chicago Bulls comes Saturday when the NBA conducts its draft lottery. After winning six championships in eight years, the Bulls endured the worst season in franchise history with a 13-37 mark. They finished with the worst record in the Eastern Conference and third-worst overall behind Vancouver and the Los Angeles Clippers. The Bulls could have as many as three first-round picks in the June 30 draft but it is their own which carries the most importance. Chicago has a 15.7 percent chance of winning the lottery but could be picking as low as sixth. Depending on where they select, the Bulls will have a chance at one of the top underclassmen who have declared for the draft, such as Rhode Island forward Lamar Odom, Duke forward Corey Maggette or UCLA point guard Baron Davis. General manager Jerry Krause is hoping to select a player who can become a cornerstone of the franchise's future, much the way Michael Jordan did as the third overall pick in 1984 and Scottie Pippen did as the fifth pick in 1987. Maggette is a Chicago native who reportedly decided to leave school after his freshman year after being told he would not slide past the Bulls, regardless of where they select. Chicago has not had a lottery pick since 1989, when it tabbed forward Stacey King sixth overall. The Bulls could also receive Phoenix's pick (16th) and have the right to take San Antonio's pick (29th). The Bulls have some luck working in their favor. The team with the worst record in the NBA -- and the best chance of winning the lottery -- has not received the top pick since 1990. The Grizzlies (8-42) have a 25 percent chance of receiving the top pick. They have chosen third, fourth and second the last three years, tabbing point guard Mike Bibby in 1998. Vancouver could stand improvement in almost every area but has pressing needs for scoring and size. The Clippers (9-41) have a 20 percent chance of winning the lottery. They won it last year and selected center Michael Olowokandi, who had an unspectacular rookie campaign but is considered somewhat of a project. They have a dire need at point guard, making Los Angeles native Davis a sentimental and practical choice. The last team to win the lottery in consecutive years was the Orlando Magic, which in 1992 chose Shaquille O'Neal and in 1993 selected Chris Webber, immediately trading him for Penny Hardaway and three first-round picks. The lottery has undergone several modifications since its introduction in 1985. In addition to expanding from seven to 13 teams, it has been increasingly weighted to ensure the worst teams of receiving the highest possible picks.  