Derrick Zimmerman for Mississipi State, point guard with some good potential. Drafted by GS warriors in 2nd round last year
http://www.nba.com/warriors/roster/zimmerman_bio.html (2001-02): Appeared in 35 games (35 starts), averaging 9.2 points, 4. 0 rebounds, 6.0 assists and 2.14 steals in 32.7 minutes...Led the SEC in assists and ranked tied for 20th in the NCAA...His 210 assists and 75 steals both ranked third on the school’s all-time single season list...Also led the team with 29 blocks and 27 dunks...Became the first player in school history to lead the team in assists, blocks and steals during the same season...Shot 53.2% from the field...Posted one double-double...Shared MSU’s Most Improved Player award with Mario Austin after doubling his scoring, assist and steal totals from the previous season.
This is, pretty clearly, a way to fill out the training camp roster. There are ALWAYS mutliple invitees to camp that don't make the team. I'm guessing this is a non-guaranteed deal contingent upon him making the team.