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Griffin, 46, was rushed to the hospital following a collision after O'Neal's vehicle veered into oncoming traffic.
Bobette Brown, a spokeswoman for Palomar Medical Center in San Diego County confirmed to ET that O'Neal had been admitted to the ER Tuesday afternoon and released a sort time later in stable condition.
No word yet on the extent of Griffin's injuries, or whether father Ryan was there.
Earlier that morning, Griffin's half brother, Redmond O'Neal was jailed in Santa Monica after police allegedly found heroin in his car during a traffic stop.