The old - timers claim her as one of their own .
Now 20 , Rubalcava is undefeated after four pro bouts and regarded as one of the gym 's best boxers .
The old - timers claim Rubalcava as one of their own .
Now 20 , Rubalcava is undefeated after four pro bouts and regarded as one of the gym 's best boxers .