Brock played star high school ball at Simeon Career Academy of the Chicago Public League.
Leading the Simeon team to the 2004 state Class AA quarterfinals, Brock became a Tribune First-Team All-State selection.
He averaged 22 points, 10 rebounds, five steals, four assists and four blocks"[4] In 2005 he began playing college ball at the University of Illinois wearing number 25, to honor the late Benjamin "Benji" Wilson Jr., as have other Simeon basketball alumni, Nick Anderson and Deon Thomas.
[5] For his senior year as the sixth man, Brock averaged 4.9 points and 3.0 rebounds in 16.7 minutes per game.
[6] When Brock did not get drafted by a National Basketball Association (NBA) team, he started his professional career in Germany.