I think their referring to this, scroll down to district 100 meter records or even the instance where Rocket himself stated he was timed at 10.2 in practice during his first practice in Track at ND.
Link: http://archives.timesleader.com/1994_7/1994_05_17_DALLAS_BOYS__HANOVER_GIRLS_FAVORED_TO_REPEAT_IN_AA_IF_MOUNTS_FAL.html