Joe was photographed leaving the Sunrise Hospital in Las Vegas, where the former NBA player is being treated, with a giant smile on his face.
Sources confirmed to PEOPLE on Sunday that Lamar, 35, is no longer on a ventilator and is breathing on his own. The athlete woke from a four-day coma on Friday after being found unconscious at a nearby brothel earlier in the week.
Cocaine and opiates were found in his system, PEOPLE also confirmed.
Joe is just one of Lamar’s many family members to rush to his side amid the health scare.
Kardashian – whose own family has been in and out of Nevada since Lamar’s hospitalization – “won’t leave his side,” a source told PEOPLE.
“He’s woken up and his heart is stronger, but there is still concern about his organs,” a family source said.