9 , ▁Roy ▁L . ▁" R ock y " ▁Dennis ▁( Er ic ▁St olt z ), ▁who ▁has ▁c ran iod ia phy se al ▁d ys pl asia , ▁is ▁accepted ▁without ▁question ▁by ▁those ▁who ▁know ▁and ▁love ▁him : ▁the ▁boy fri ends ▁of ▁his ▁fre ew heel ing ▁b iker ▁mother , ▁particularly ▁Gar ▁( Sam ▁Elli ott ); ▁his ▁" ext ended ▁motor cycle ▁family "; ▁and ▁his ▁mat ernal ▁grand par ents ▁( Rich ard ▁D ys art ▁and ▁Est elle ▁Get ty ) ▁who ▁share ▁his ▁love ▁of ▁baseball ▁card ▁collect ing . ▁However , ▁many ▁others ▁fail ▁to ▁see ▁his ▁human ity , ▁intelligence ▁and ▁humor ▁and ▁thus ▁respond ▁to ▁his ▁unusual ▁appearance ▁with ▁fear , ▁pity , ▁awk ward ness , ▁and ▁uncertainty . ▁Rock y ' s ▁mother , ▁Florence ▁" R ust y " ▁Dennis ▁( Ch er ), ▁is ▁determined ▁to ▁give ▁Rock y ▁as ▁normal ▁a ▁life ▁as ▁possible , ▁in ▁spite ▁of ▁her ▁own ▁wild ▁ways ▁as ▁a ▁member ▁of ▁the ▁Tur ks ▁b iker ▁gang , ▁as ▁well ▁as ▁her ▁stra ined ▁relationship ▁with ▁her ▁parents . ▁She ▁f ights ▁for ▁Rock y ' s ▁inclusion ▁in ▁a ▁main stream ▁junior ▁high ▁school ▁and ▁confront s ▁a ▁principal ▁who ▁would ▁rather ▁re legate ▁him ▁to ▁a ▁special ▁education ▁school , ▁despite ▁the ▁fact ▁that ▁his ▁condition ▁hasn ' t ▁affected ▁his ▁intelligence . ▁They ▁then ▁go ▁to ▁the ▁doctor ▁for ▁Rock y ' s ▁semi -